[tex] \\ \huge \green{ Formula: }\\ \\ \green{a {}^{2} + 2ab + {b}^{2} = (a + b) {}^{2} }[/tex]
a) x²+6x +....
6x= 2ab =2•x•3→b=3
a²=x²→a=x
x²+6x+3²=
=x²+6x+9=(x+3)²
d) x²+14x+....
14x=2ab=2•x•7→b=7
a²=x²→a=x
x²+14x+7²=
=x²+14x+49=(x+7)²
g)x²+36x+...
36x=2ab=2•x•18→b=18
a²=x²→a=x
x²+36x+18²=
=x²+36x+324=(x+18)²
j)9x²+24x+...
a²=9x²→a=3x
24x=2ab=2•3x•4→b=4
9x²+24x+4²=
=9x²+24x+16=(3x+4)²
