3 years ago

How to work on this? (x+1) (x+1) (x+1) what the answers will be?

Mathematics

1 answer:

Harman [31]3 years ago

3 0

Just combine like terms! So x^3 and 1^3!

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What number must you add to the polynomial below to complete the square?<br><br> x2 + 15x

Aleksandr-060686 [28]

Answer:

The number $\frac{225}{4}$ is added to the polynomial below to complete the square.

Step-by-step explanation:

Perfect square binomial:

A perfect square binomial is given by:

$(a + b)^2 = a^2 + 2ab + b^2$

In this question:

We have that:

$a^2 + 2ab + b^2 = x^2 + 15x + ?$

Since $a = x$ , we have that:

$2ab = 15x$

$2b = 15$

$b = \frac{15}{2}$

Completing the square:

The term that completes the square is $b^2$ . So

$b^2 = (\frac{15}{2})^2 = \frac{225}{4}$

The number $\frac{225}{4}$ is added to the polynomial below to complete the square.

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Answer:

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Step-by-step explanation:

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Answer:

The answer for x=2 is, 15. And the answer for x=-2 is, -1.

Step-by-step explanation:

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