[tex] (a+b)^2 = a^2+2ab+b^2\\\\4x^2+ 36+..... \\ \\ b^2=36 \\b=\sqrt{36} \\b=6 \\\\ a^2=4x^2 \\a=\sqrt{4x^2}\\a=2x \\ \\(2x+6)=4x^2+24x+36 \\ \\Answer: \ 4x^2+ 36 +24x[/tex]
[tex]121+88x+..... \\ \\ b^2=121 \\b=\sqrt{121} \\b=11 \\\\88x=2a\cdot 11\\ 88x=22a \ \ / :2 \\ a=4x\\\\(4x+11)^2 =16x^2+88x+121 \\ \\Answer: \ 121+88x+ 16x^2[/tex]
[tex]25x^2+80xy+..... \\ \\ a^2=25x^2\\a=\sqrt{25x^2} \\a=5x\\\\80xy=2\cdot 5x\cdot b\\ 80xy=10xb \\80y=10b\ \ /:10 \\b=8y\\\\(5x+8y)^{2}=25x^2+80xy+64y^2 \\ \\Answer: \ 25x^2+80xy+ 64 y^2[/tex]
