Subtract the sum of $2x - x^2 + 5$ and $-4x - 3 + 7x^2$ from $5$.

AcademicMathematicsNCERTClass 8

To do:

We have to subtract the sum of $2x - x^2 + 5$ and $-4x - 3 + 7x^2$ from $5$.

Solution:

Sum of $2x - x^2 + 5$ and $-4x - 3 + 7x^2$ is,

$2x - x^2 + 5+(-4x - 3 + 7x^2)=2x - 4x- x^2 + 7x^2 + 5-3$

$=-2x+6x^2+2$

Subtracting $-2x+6x^2+2$ from $5$,

$5-(-2x+6x^2+2)=5+2x-6x^2-2$

$=-6x^2+2x+3$

raja
Updated on 10-Oct-2022 13:19:29

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