Question

помогите с Алгеброй, решите с решением​

Answer 1

$\displaystyle A4\\\\25x^2+30x+9=5^2x^2+2*5x*3+3^2=(5x)^2+2*5x*3+3^2=(5x+3)^2\\\\Otvet:\boxed{(5x+3)^2}\\\\\\B1\\\\-\frac{1}{4}x^2-xy-y^2=-(\frac{1}{4}x^2+xy+y^2 )=-(\frac{1}{2}x+y )^2\\\\x=36\;\;\;\;y=-12 \\\\-(\frac{1}{2} *36+(-12))^2=-(\frac{1}{2} *36-12)^2=-(18-12)^2=-6^2=-36\\\\Otvet:\boxed{-36}\\\\\\B2\\\\64+ 32x+*=8^2+2*8*2x+(2x)^2=(8+2x)^2\\\\(8+2x)^2=64+32x+4x^2\\\\Otvet:\boxed{4x^2}$