The sum of two expression is (x2+9x13) If one of them (2x3-5x+7) find other
Answers
Given info : The sum of two expression is (x² + 9x + 13) if one of them is (2x³ - 5x + 7).
To find : The other expression is...
solution : let the other expression is f(x).
a/c to question,
sum of two expression is (x² + 9x + 13) and one of them is (2x³ - 5x + 7).
so, f(x) + (2x³ - 5x + 7) = x² + 9x + 13
⇒f(x) = (x² + 9x + 13) - (2x³ - 5x + 7)
= x² + (9x + 5x) + (13 - 7) - 2x³
= x² + 14x + 6 - 2x³
= -2x³ + x² + 14x + 6
Therefore the other expression is (-2x³ + x² + 14x + 6).
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