Question

Encontre as soluções das seguintes equações do 2º grau:

a-x 2 = 144
b-y 2 – 100 = 0
c-x 2 – 225 = 0
d-4x2 – 12 = 0
e-x2 + 4x + 4 = 0
f-x2 – 16 x + 64 = 0


ME AJUDEM PFV​

Answer 1

$a) x=\sqrt{144} \\x=12\\\\b) y^2= 100\\y=\sqrt{100}\\ y=10\\\\c) x^2=225\\x=\sqrt{225}\\ x=15\\\\d) 4x^2=12\\x^2=\frac{12}{4} \\x=\sqrt{3} \\\\e) x^2 + 4x + 4 = 0 \\delta=16 -4(4)\\delta=16-16\\delta=0\\x= \frac{-4+0}{2} \\x = -2\\\\f) x^2 -16x+64=0\\delta=256 -4(64)\\delta=0\\x=\frac{16+0}{2} \\x=8$