Question

si
A=3χ²+x -7
B=8χ²- 5X -10
C=5χ²+ 3X -1
HALLAR :A + B - C
URGENTE !!!!!

Answer 1

Explicación paso a paso:

A=3χ²+x -7

B=8χ²- 5X -10

C=5χ²+ 3X -1

Encontrar A + B - C

(3x²+x -7) +(8x²- 5x-10) - (-5x²+3x-1)

3x²+x -7 +8x²- 5x-10 - ( -5x²+3x-1)

11x²-4x-17+5x²-3x+1

16x²-7x-16

Factorizamos:

16x²-7x-16=0

16*-16=-256*-4=1,024+49=$\sqrt{1,073}$

x₁=$\sqrt{1,073} +(-7)-=\frac{\sqrt{1,073} +7}{32} = 1.026979795322186$

x₂=$\sqrt{1,073} -(-7)-=\frac{\sqrt{-1,073}+7}{32} = 1.020301732332157$

Saludos.