What can you add to $x^{2} - 9 x$ $x^2-9x$ to get a perfect square trinomial?

Question

What can you add to $x^{2} - 9 x$ $x^2-9x$ to get a perfect square trinomial?

1 Answer

Impact of this question

4686 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-05-12T19:56:25

$20.25$ $20.25$

Explanation:

In a perfect square, the equation is $a x^{2} + b x + c$ $ax^2+bx+c$ , where $| b | = 2 a \sqrt{c}$ $abs(b) = 2asqrt(c)$ . Therefore, to find $c$ $c$ , plug in $a$ $a$ and $b$ $b$ .

$| b | = 2 a \sqrt{c}$ $abs(b)=2asqrt(c)$

$| - 9 | = 2 \cdot 1 \cdot \sqrt{c}$ $abs(-9) = 2*1*sqrt(c)$

$9 = 2 \cdot \sqrt{c}$ $9 = 2*sqrt(c)$

$4.5 = \sqrt{c}$ $4.5 = sqrt(c)$

$20.25 = c$ $20.25 = c$

Science

Math

Humanities

... and beyond

What can you add to $x^{2} - 9 x$ $x^2-9x$ to get a perfect square trinomial?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

What can you add to x^2-9xx2−9xx^2-9x to get a perfect square trinomial?

1 Answer

Explanation:

Related questions

Impact of this question

What can you add to $x^{2} - 9 x$ $x^2-9x$ to get a perfect square trinomial?