Three mark exercise problems IX — task. Mathematics State Board, Class 7.

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Simplify and find the degree of the expression

$4x^2 - 3x - \left[8x - \left(5x^2 - 8 \right) \right]$ .

Answer:

Expression

$=$

Degree

$=$

Answer variants:

$9x^2 - 11x + 8$

$2$

$9x^2 - 11x - 8$

$9x^2 + 11x - 8$

$5$

$3$

$4$

$1$

$9x^2 + 11x + 8$

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