Question

factorise:x ³+13x²+32x+20 if x+2 is its factor​

Answer 1

Answer:

I don't know this answer because I am in class 7

Answer 2

X³+13x²+32x+20

=(x+1)(x²+12x+20) [∵, for x=-1, x³+13x²+32x+20=-1+13-32+20=0]

=(x+1)(x²+10x+2x+20)

=(x+1){x(x+10)+2(x+10)}

=(x+1){(x+10)(x+2)}

=(x+1)(x+2)(x+10