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Simplify x(2x – 1) + 5 …

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Simplify x(2x – 1) + 5 and find its value at x = -2.

Posted by Vidya Tamminidi 7 years, 1 month ago

CBSE > Class 08 > Mathematics

2 answers

Pushp Raj 7 years, 1 month ago

2x^2-x+5=(2{-2×(-2)})-2+5 =2×4-2+5 =8+3 =11

Yogita Ingle 7 years, 1 month ago

x (2x - 1) + 5 = (-2) [2(-2) - 1] + 5
= (-2)[-4 - 1]+ 5
= (-2)(-5) + 5
= 10 + 5
= 15

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