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2 years ago

What is the factored form of the following expression? x^2-10xy+21y^2

Mathematics

1 answer:

valentinak56 [21]2 years ago

4 0

The answer would be (x-3y) (x-7y)
You have to group them together

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Simplify the expression. Show your work. 22 + (32 – 4 2 )

Alex Ar [27]

You have to use PEMDAS:

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

First, do parentheses.

32 - 42 = -10

22 + -10 = 12

Answer = 12

Hope this helped
Have a great day :)

8 0

2 years ago

I need help asap please

rjkz [21]

Answer:

$x = -\frac{3}{2}$ or $x = 1$

Step-by-step explanation:

Using the zero product property, first step is to set the given equation, $2x^2 + x - 1 = 2$ , to zero. Then factorise the left side.

Thus,

$2x^2 + x - 1 = 2$

Subtract 2 from both sides

$2x^2 + x - 1 - 2 = 2 - 2$

$2x^2 + x - 3 = 0$

Factorise the left side

$2x^2 + 3x - 2x - 3 = 0$

$x(2x + 3) - 1(2x + 3) = 0$

$(x - 1)(2x + 3) = 0$

Find the solution

$x - 1 = 0$

$2x + 3 = 0$

$x = 1$

$2x + 3 = 0$

$2x = -3$

$x = -\frac{3}{2}$

The answer is: $x = 1$ or $x = -\frac{3}{2}$

3 0

2 years ago

Which order pairs in the form (x,y) are solutions to the equation 6x-y/2=14 (-9,3),(2,-4)

Goshia [24]

Answer:

(2,-4)

Step-by-step explanation:

Just plug in the numbers

6(2)- (-4)/2=14

12- -2=14

14=14

5 0

2 years ago

Phil has drawn some house plans in which the lounge room will be 9.5 m long when it is built. This length has been drawn as 19cm

Monica [59]

Answer:

1:50 scale

Step-by-step explanation:

9.5m * 100 = 950cm

950/19 = 50

7 0

2 years ago

682 rounded to the nearest hundred

defon

700, because 8 is 5 and up so it'll be rounded up.

4 0

2 years ago

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