Question

escreva as seguintes equacoes na forma reduzida depois resolva-as no caderno
a) (x+4)² = 9x +22

Answer 1

(x+4)²=9x+22
x²+8x+16-9x-22=0
x²-x-6=0
a=1
b=-1
c=-6

Δ=b²-4ac
Δ=1+24
Δ=25
√Δ=√25
√25= ±5

x=(-b±√Δ)/2a

$x'= \frac{1+5}{2} = \frac{6}{2}=3$

$x"= \frac{1-5}{2} =- \frac{4}{2} =-2$

S={-2,3}