factorize 4x^3+2x^2-8x+7
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p(x) = 4x^3+2x^2-8x+7
by trial method 1,2,3
x= 1
p(1) = 4(1)^3 + 2(1)^2 - 8(1) + 7
= 4(1) + 2(1) - 8 + 7
= 4 + 2 - 8 + 7
= 6 - 1
= 5
by trial method 1,2,3
x= 1
p(1) = 4(1)^3 + 2(1)^2 - 8(1) + 7
= 4(1) + 2(1) - 8 + 7
= 4 + 2 - 8 + 7
= 6 - 1
= 5
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