Mathematical simplification and evaluation of the first volume of grade seven - Training Enrollment Network

Mathematical simplification and evaluation of the first volume of grade seven

(6x+7)(5x+6) x = 1 is known. Simplify it first, then find the value of this formula.

Solution: The original formula = =30x? +36x+35x+42

=30x？ +7 1x 142

Replace the original formula = 30+7 1+42 = 143.

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