Question

(5x-2)² = 4(2-x)²

Answer 1

Ta có;

(5x-2)^2=4(2-x)^2

(5x-2)^2=4(4-4x+x^2)

(5x-2)^2=16-16x+4x^2

(5x-2)^2=(4-2x)^2

5x-2=4-2x

5x+2x=2+4

7x=6

x=6/7

Answer 2

(5x-2)^2=4(2-x)^2

(5x-2)^2=4(4-4x+x^2)

(5x-2)^2=16-16x+4x^2

(5x-2)^2=4^2-16x+(2x)^2

(5x-2)^2=(4-2x)^2

5x-2=4-2x

5x+2x-2-4=0

7x-6=0

7x=6

x=6/7