$\bf \qquad \textit{perfect square trinomial} \\\\ (a\pm b)^2\implies a^2\pm \stackrel{\stackrel{\text{\small 2}\cdot \sqrt{\textit{\small a}^2}\cdot \sqrt{\textit{\small b}^2}}{\downarrow }}{2ab} + b^2 \\\\[-0.35em] ~\dotfill$

$\bf x^2+15x+\boxed{?}^2\implies \stackrel{\textit{we know the middle term is}}{2\sqrt{x^2}\cdot \sqrt{\boxed{?}^2}\implies 2x\boxed{?}}\qquad then\qquad 2x\boxed{?}=15x \\\\\\ \boxed{?}=\cfrac{15x}{2x}\implies \boxed{?}=\cfrac{15}{2}\qquad \impliedby \textit{we should add that much \underline{squared}} \\\\[-0.35em] ~\dotfill\\\\ x^2+15x+\left( \cfrac{15}{2} \right)^2\implies \left(x+ \cfrac{15}{2} \right)^2$

5 0

4 years ago

Will someone please help me solve this !!

Cerrena [4.2K]

360=95+120+120+125+x+84+x

360=544+2x

-184=2x

x= -92

7 0

4 years ago

What's the least common multiple for 6x^2-54 and 9x^2-54x+81

Maru [420]

Answer:

im sorry i really need some point for this exam

Step-by-step explanation:

7 0

3 years ago

NEED HELP FAST---------------Slope equals negative 9, y-intercept equals 3------ A.

GaryK [48]

Answer:

y = -9x +3

Step-by-step explanation:

Slope = -9

y intercept = 3

We can use the slope intercept form

y = mx+b where m is the slope and b is the y intercept

y = -9x +3

7 0

4 years ago

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