Question

2x² - 17x -42=0by splitting the middle term ​

Answer 1

Answer:

2x^2 -17x -42=0

2x^2 - 21x+4x -42=0

X(2x-21) +2(2x-21)=0

(X+2)(2x-21)=0

Answer 2

2x²-17x-42=0

2x²-21x+4x-42=0

x(2x-21)+2(2x-21)=0

(x+2)(2x-21)=0

x+2=0 => x=-2

and 2x-21=0 => 2x=21 => x=21/2

x= -2 , 21/2