Jawabanmu

2014-08-13T18:39:13+07:00
= (2a+3b)(2a+3b) + (a-b)(a-b)
= (4a²+12ab+9b²) + (a²-2ab+b²)
= 5a²+10ab+10b²
= a²+2ab+2b²
2014-08-13T18:44:56+07:00
(2a+3b)pngkt 2 +(a-b) pngkt 2 =4a pnkgt 2+6b pngkt 2+a pngkt 2 -b pngkt 2 =4a pngkt + a pngkt 2 +6b pngkt 2 -b pngkt 2 =5a pngkt 2 + 5b pngkt 2