- 蓦松
-
a平方十b平方=12,ab=一3
12十2x(一3)=6
- bikbok
-
需要过程吗?
(a+b)的平方=a平方+b平方+2ab=12+2x(-3)=12-6=6
- 余辉
-
(a+b)^2
=a^2+2ab+b^2
=a^2+b^2+2ab
=12+2×(-3)
=6
- 大鱼炖火锅
-
(a+b)^2=a^2+2ab+b^2=12+2*(-3)=6
- Chen
-
(a+b)^2=a^2+b^2+2ab
=12+2x(-3)
=12-6
=6
- 敬岭
-
12-6=6
a平方十b平方=12,ab=一3
12十2x(一3)=6
需要过程吗?
(a+b)的平方=a平方+b平方+2ab=12+2x(-3)=12-6=6
(a+b)^2
=a^2+2ab+b^2
=a^2+b^2+2ab
=12+2×(-3)
=6
(a+b)^2=a^2+2ab+b^2=12+2*(-3)=6
(a+b)^2=a^2+b^2+2ab
=12+2x(-3)
=12-6
=6
12-6=6