Question

A) x²+x-56=0

B) x²-5x+71=0

C) x²-14x+49=0

D) x²-12x-20=0

E) x²-8x+14x=0

F) x²-(3+√2)x+3√2=0

Answer 1

a)x²+x-56=0 
( x + 8 ) ( x - 7 ) = 0, x' = -8, x'' = -7