the value of polynomial 7x4 +3x2-4 when x=-2 is
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Answer:
20
Step-by-step explanation:
becoz substituting x=-2 in x place so...
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•here we know (x=-2)
= 7×(-2)×4+3×(-2)×2-4
= (-56)+(-12)-4
= -56-12-4
= -56-16
= -72
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