Question

Factor completely: 2x^2 - 8x - 42

Answer 1

You must learn how to do this:)
2x^(2)-8x-42

Factor out the GCF of 2 from each term in the polynomial.
2(x^(2))+2(-4x)+2(-21)

2(x^(2)-4x-21)

2(x+3)(x-7)

Answer 2

(2x+6)(x-7)