which of the binomials below is a factor of this trinomial? x^2+4x-60 A)x+6 B)x^2-6 C)x-6 D)x-10

Question

which of the binomials below is a factor of this trinomial?         x^2+4x-60   A)x+6  B)x^2-6  C)x-6  D)x-10

akashdeepdeb · Answer

So watcha waiting for?
factorize!! :D
x2 + 4x - 60
So write 4x in the form of factors of 60
Like this 10x-6x right? [BECAUSE 10*6 = 60]
Getting me?
So x2 + 10x - 6x - 60
Group first, second 
And third fourth to get The 2 factors!! :D

akashdeepdeb · Answer

If the Quadratic expression is
Ax2 + Bx + c [WHERE ALPHA AND BETA ARE ROOTS]
Then alpha + beta should be -B/A
And alpha*beta = C/A
Getting me? :)