+806 What is the coefficient of x in (x3+x2+x+1)(x4−8x3+17x2−23x+14)?
+1453
Every item in the first term is multiplied with every item in the second term.
Pick out the items that, when multiplied, result in an "x" coefficient product.
(x3 + x2 + x + 1) • (x4 – 8x3 + 17x2 – 23x + 14) gives you + 14x
(x3 + x2 + x + 1) • (x4 – 8x3 + 17x2 – 23x + 14) gives you – 23x
add them together for the final value – 9x
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