a*a+5ab=76 3b+2ab=51求a*a+11ab+9b*b讲解要求讲解要求讲解a*a+5ab=76 3b*b+2ab=51求a*a+11ab+9b*b

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a*a+5ab=76 3b+2ab=51求a*a+11ab+9b*b讲解要求讲解要求讲解a*a+5ab=76 3b*b+2ab=51求a*a+11ab+9b*b
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a*a+5ab=76 3b+2ab=51求a*a+11ab+9b*b讲解要求讲解要求讲解a*a+5ab=76 3b*b+2ab=51求a*a+11ab+9b*b
a*a+5ab=76 3b+2ab=51求a*a+11ab+9b*b讲解
要求讲解要求讲解
a*a+5ab=76 3b*b+2ab=51求a*a+11ab+9b*b

a*a+5ab=76 3b+2ab=51求a*a+11ab+9b*b讲解要求讲解要求讲解a*a+5ab=76 3b*b+2ab=51求a*a+11ab+9b*b
因为3b*b+2ab=51
方程两边左右乘3得:
9b*b+6ab=153
左右分别与方程a*a+5ab=76左右相加得:
a*a+11ab+9b*b=76+153=229

应该是"a*a+5ab=76 3b*b+2ab=51求a*a+11ab+9b*b讲解"吧!
a*a+11ab+9b*b
=(a*a+5ab)+3*(3b*b+2ab)
=76+3*51
=76+153
=229.