Question

Someone help PLEASE

Answer 1

Answer:

Q4. (-7)

Q5. (-8)

Step-by-step explanation:

The perfect square:

$(a+b)^2=a^2+2ab+b^2$

Q4

We have

$y^2+14y+49=0\\\\y^2+2(y)(7)+7^2=0\\\\(y+7)^2=0\iff y+7=0\qquad\text{subtract 7 from both sides}\\\\\boxed{y=-7}$

Q5

We have

$y^2+16y+64=0\\\\y^2+2(y)(8)+8^2=0\\\\(y+8)^2=0\iff y+8=0\qquad\text{subtract 8 from both sides}\\\\\boxed{y=-8}$