(a+2b)(5a+3b)=()

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(a+2b)(5a+3b)=()
(a+2b)(5a+3b)=()

(a+2b)(5a+3b)=()
5a^2+13ab+6b^2

=5a2+13ab+6b2

5a^2+13ab+6b^2

5a平方+13ab+6b平方=0

5a²+13ab+6b²