Answer:
=x4−x3−6x2+5x−1
Explanation:
(x2−3x+1)(x2+2x−1)
=(x2+−3x+1)(x2+2x+−1)
=(x2)(x2)+(x2)(2x)+(x2)(−1)+(−3x)(x2)+(−3x)(2x)+(−3x)(−1)+(1)(x2)+(1)(2x)+(1)(−1)
=x4+2x3−x2−3x3−6x2+3x+x2+2x−1
first multiply
2x-3x+1+2x+2x-1
add all like terms
3x+1-1
final answer is 3x
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