Ayuda por favor x^(2)+2x-a^(2)-4a-3

Mathematics

2 answers:

xz_007 [3.2K]2 years ago

7 0

Translating:

Please help

I believe you want me to factor it, so:

( x + 1/2 )^2 + ( a - 2 )^2 - 14/2

kotykmax [81]2 years ago

7 0

Answer:

$x=a+1,\:x=-a-3$

Step-by-step explanation:

Remove parenthesis:

$x^2+2x-a^2-4a-3=0$

$x_{1,\:2}=\frac{-2\pm \sqrt{2^2-4\cdot \:1\cdot \left(-a^2-4a-3\right)}}{2\cdot \:1}$

$x_{1,\:2}=\frac{-2\pm \:2\left(a+2\right)}{2\cdot \:1}$

$x_1=\frac{-2+2\left(a+2\right)}{2\cdot \:1},\:x_2=\frac{-2-2\left(a+2\right)}{2\cdot \:1}$

$\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}$

$x=a+1,\:x=-a-3$

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Alice wants to put wall-to-wall carpeting in a small room with the floor plan shown.

AURORKA [14]

I found the complete problem.

If Alice divides it into two trapezoids, the area formula would be: A = [(a+b) / 2] * h
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A = [(7.5 + 15)/2 * 5
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A = [(5 + 10)/2 * 7.5
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