Question

(y+3) (y-3) -y(y+5)=6​

Answer 1

Answer:

$\huge\boxed{y=-3}$

Step-by-step explanation:

$(y+3)(y-3)-y(y+5)=6\\\\\text{use}:\\(a+b)(a-b)=a^2-b^2\\\text{the distributive property}:\ a(b+c)=ab+ac\\\\y^2-3^2-(y)(y)-(y)(5)=6\\\\y^2-9-y^2-5y=6\\\\-9-5y=6\\+9\qquad\ \ +9\\\\-5y=15\\\\\dfrac{-5y}{-5}=\dfrac{15}{-5}\\\\y=-3$