Question

Resolva as equações:

a) 5(x2 - 1) = 4(x2 + 1)

b) x(x +2) = 2x + 25


Urgente!!!!!!!!!!!!!!!!!!!

Answer 1

5x²-5=4x²+4
5x²-4x²=4+5
x²=9
x=√9
x=3





x²+2x=2x+25
x²+2x-2x=25
x²=25
x=√25
x=5