Question

WORDED QUADRATIC EQUATION!!! PLS HELP

MOSTLY NUMBER 5 PLS

Answer 1

7,11

Explanation:

The width is x. x+4= the length. The area is side times side, so it’s

x × (x+4) = 77

We can simplify this to:

x × x + x × 4 = 77

x^2 + 4x = 77

x^2 + 4x - 77 = 0 This is a quadratic equation. So we can solve using the quadratic formula:

x =
`(-4\pm√(4^2-4\cdot1\cdot-77))/(2\cdot1)` ->

`(-4\pm18)/(2)`

`(14)/(2) \implies7`

That’s the positive solution and that’s x, the width. So the width is 7 and the length is 7+4=11