PLEASE HELP!! 50 POINTS!!

1 answer:

3 0

They are saying to write a quadratic that can be factored so you can start with factors and then expand it like say:

(x+1)(x+2) are arbitrary factors, then the expansion is

x^2+3x+2 which we know can then be factored to what we started with...

In general to factor a quadratic of the form ax^2+bx+c, you need to find two values, j and k, which satisfy two conditions:

ac=jk=2 and b=j+k=3, so j and k must be 1 and 2

Then you replace bx with jx and kx in the original equation to get:

x^2+x+2x+2 now factor 1st and 2nd pair of terms...

x(x+1)+2(x+1) which is equal to

(x+1)(x+2)

....

If j and k are integers, the above method is the quickest and easiest.

Next in line of preference is completing the square if there are fractional numbers in the original equation.

And if there are very difficult decimals or fractions it is best to just use the quadratic formula (which is derived from completing the square)

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Madison planted her garden with 2 5 marigolds and 3 7 tulips. What fraction of the plants in the garden are either marigolds or

vfiekz [6]

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2/5 = 14/35 and 3/7 = 15/35

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rosijanka [135]

Answer:

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bezimeni [28]

First, you must find the width of GHJK. Since the area of it is 84m², divide 84 by 7.
84÷7=12
So the width of GHJK is 12m.
Next, find the scale of GHJK to LMNP. Since the height of both are already available, you can divide 21÷7 to get 3
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2 years ago

How should I do this question

Ivanshal [37]

Answer:

( 11 -6)

( -5 6 )

Step-by-step explanation:

Multiply the first row of N by first column of M. This will give the first element in top row of the answer :-

-3*-2 + 1*5 = 11

Then multiply the first row in N by the second column of M to give the second element of the top row.

-3*0 + 1*-6 = -6

Then do a similar process with the second row in N.

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3 years ago

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Find the value of x for the following equivalent functions: f(x)=2x^2−3x+4 and f(x)=2x^2−1

masha68 [24]

A) y = 2x – 7 and f(x) = 7 – 2xIncorrect. These equations look similar but are not the same. The first has a slope of 2 and a y-intercept of −7. The second function has a slope of −2 and a y-intercept of 7. It slopes in the opposite direction. They do not produce the same graph, so they are not the same function. The correct answer is f(x) = 3x2 + 5 and y = 3x2 + 5. B) 3x = y – 2 and f(x) = 3x – 2Incorrect. These equations represent two different functions. If you rewrite the first equation in terms of y, you’ll find the equation of the function is y = 3x + 2. The correct answer is f(x) = 3x2 + 5 and y = 3x2 + 5. C) f(x) = 3x2 + 5 and y = 3x2 + 5Correct. The expressions that follow f(x) = and y = are the same, so these are two different ways to write the same function: f(x) = 3x2 + 5 and y = 3x2 + 5. D) None of the aboveIncorrect. Look at the expressions that follow f(x) = and y =. If the expressions are the same, then the equations represent the same exact function. The correct answer is f(x) = 3x2 + 5 and y = 3x2 + 5.

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2 years ago