+128407 First one....correct !!!
Second one ....I think "B" is what they want...however.....your answer could "factor" as [ ( x + 5) - 1 ] [ ( x + 5) + 1 ] = 0...so....it's a legitimate step, too....!!!
Third one...you're close...but it's "A"...note
(t - 3) ( t - 5) = 0
t^2 - 3t - 5t + 15 = 0
t^2 - 8t + 15 = 0
Last one....correct !!!
