Question

calcula el siguiente producto (7x - 6)(7x + 2)

Answer 1

$49 {x}^{2} + 14x - 42x - 12 \\ 49 {x}^{2} - 28x - 12$

Answer 2

(7x-6)(7x+2)=49x+14x-42x-12

49x+14x-42x=+12

21x=12

x=12/21

x=0,571