Question

Use substitution to solve.2x2 = 5 + y4y = -20 + 8x2Solve the first equation for y and substitute it into the se4y = 16x? - 604y = 16x2 - 608x2 - 20 = -20 + 8x2.X 2x = 5 + 2x2 - 5

Answer 1

Step by step explanation:

Lets solve the first equation for y:

`2x^2=5+y`
`2x^2-5=y`
`y=2x^2-5`

And replacing that value in the second equation we have:

`4y=16x^2-60`
`4(2x^2-5)=-20+8x^2`
`8x^2-20=-20+8x^2`

Answer:

After replacing we have:

`8x^2-20=-20+8x^2`