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Math problems in grade one. On the operation of algebraic expressions.
∵a？ +6a+b？ - 10b+34=0

Answer? +6a+9+b？ - 10b+25=0

(a+3)？ +(b-5)？ =0

∴a+3=0 b-5=0

a=-3 b=5

∴(2a+b)(3a-2b)+4ab

=6a？ -ab-2b？ +4ab

=6a？ +3ab-2b？

=6*(-3)? +3*(-3)*5-2*5?

=54-45-50

=-4 1

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