Factorise; x3+13x2+3xz+20
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Answer:
Answer. Therefore (x + 1) is a factor of p(x). Hence, x3 + 13x2 + 32x + 20 = (x + 1) (x +2) (x + 10) .
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The value of x
3
+13x
2
+32x+20 is
x
3
+x
2
+12x
2
+12x+20x+20
=x
2
(x+1)+12x(x+1)+20(x+1)
=(x−1)(x
2
+12x+20)
=(x−1)(x
2
+10x+2x+20)
=(x+1)[x(x+10)+2(x+10)]
=(x+1)(x+2)(x+10)
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