Apply the square root property of equality: Isolate the variable.

StartRoot (x + 9) squared EndRoot = Plus or minus StartRoot 25 EndRoot
If x + 9 = 5, then x =
.

If x + 9 = –5, then x =
.

Step-by-step explanation:

Given

Required

Determine the values of x

Determine the square root of 25

Evaluate the expression on the left hand side

Using laws of indices

Split the expression into 2

Subtract 9 from both sides in both cases

250

step-by-step explanation:

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225