Question

Solve each equation by taking square roots

10p^2 +20=1490

Answer 1

10p^2+20=1490
1
`\sqrt{10p^(2) =1470} 10p=38.34 p=3.834`0p^2=1470

Answer 2

`10p^2 +20=1490`


`10p^2=1490-20`
`Subtract \ 20 \ from \ both \ sides`


`10p^2=1470`


`p^2= (1470)/(10)`
`Divide \ both \ sides \ by \ 10`


`p^2=147`


`p=+ √(147)`
`Take \ the \ square \ root \ of \ both \ sides`


`p=+7 √(3)`