Question

equações do 2° grau, prfvrr me ajudem

a) x² - 3x/4 + 1/8 = 0

b) x²/2 + 3x = 8​

Answer 1

a) 8x²-6x+1=0

8x²-2x-4x+1=0

2x×( 4x-1)-( 4x-1)=0

(4x-1)×(2x-1)=0

4x-1=0

2x-1=0

x=1/4

x=1/2

x1=1/4

x2=1/2

b) x²+6x=16

x²+6x-16=0

x²+8x-2x-16=0

x×(x+8)-2(x+8)=0

(x+8)×(x-2)=0

x+8=0

x-2=0

x=-8

x=2

x1=-8

x2=2