brooklyn4932
brooklyn4932 brooklyn4932
  • 03-06-2019
  • Mathematics
contestada

Someone help PLEASE

Someone help PLEASE class=

Respuesta :

gmany
gmany gmany
  • 03-06-2019

Answer:

Q4. (-7)

Q5. (-8)

Step-by-step explanation:

The perfect square:

[tex](a+b)^2=a^2+2ab+b^2[/tex]

Q4

We have

[tex]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}[/tex]

Q5

We have

[tex]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}[/tex]

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