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3 years ago

How can you use the quadratic formula to complete a square?

2 answers:

6 0

It has become somewhat fashionable to have students derive the Quadratic Formula themselves; this is done by completing the square for the generic quadratic equation ax2 + bx + c = 0. While I can understand the impulse (showing students how the Formula was invented, and thereby providing a concrete example of the usefulness of abstract symbolic manipulation), the computations involved are often a bit beyond the average student at this point.

notka56 [123]3 years ago

5 0

Step 1 Divide all terms by a (the coefficient of x2).Step 2 Move the number term (c/a) to the right side of the equation.Step 3 Complete the square on the left side of the equation and balance this by adding the same value to the right side of the equation.

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3/4 and 7/8 are equivalent fractions. true or false?

ANTONII [103]

False 3/4 is smaller than 7/8

5 0

3 years ago

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Submission in an houuuur!!! Please send help and can I please have the explanation.

Ksenya-84 [330]

Answer:

It should 3/10

Step-by-step explanation:

3 0

3 years ago

What is 4/5 + 3/10 equal

Digiron [165]

Answer:

11/10

Step-by-step explanation:

4\5 + 3/10

U need to make the denominator the same. 10 is a multiple of 5. to get 10 u times by 2

so 4\5 times by 2 =8/10 whatever you do to the denominator you do top. now you add the numerators 8+3= 11 so ur answer is 11/10

4 0

3 years ago

If a- b= 2 and ab= 15 then a3-b3? a) 30 b) 98 c) 20 d) 60 full explanation please

krek1111 [17]

Answer:

C) 20

Step-by-step explanation:

ab=15

5*3 = 15

which is a and which is b

a - b = +2

5 - 3 = + 2

------------------

a = 5 and

b = 3

------------------

a3-b3 = 53 - 33 = 20

7 0

3 years ago

Read 2 more answers

If the ratio y/x is the same for all related pairs of x and y, what does that mean

Verizon [17]

Answer:

The same ratio indicates that there is a proportional relationship between y and x.

Step-by-step explanation:

We know when y varies directly with x, the equation is

y ∝ x

$y=kx$

$k\:=\:\frac{y}{x}$

Here,

k is the constant of proportionality.

The ratio y/x indicates that k is a constant of proportionality.

Thus, the same ratio indicates that there is a proportional relationship between y and x.

When x increases, y increases, and when y decreases, x also decreases.

4 0

3 years ago