Find the value of x^2 + 1/x^2, if x – 1/x = √7
Find the remainder when polynomial 2x4 - 6x3 + 2x2 – x +2 is divided by x + 2
PLS URGENT HAI!!!
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Answer:
If x + 2 = 0
x = -2
f(x) = 2x4 – 6x3 + 2x2 – x + 2, [By remainder theorem]
f(x) = 2(-2)4 – 6(-2)3 + 2(- 2)2 – (- 2) + 2
= 2(16) – 6(- 8) + 2(4) + 2 + 2
= 32 + 48 + 8 + 2 + 2 = 92
Hence, required remainder = 92.
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