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Popular >

x=sqrt(-4x+21)

Solution

x = - 4 x + 21

Solution

x = 3

Solution steps

x = - 4 x + 21

Square both sides:

x^{2} = - 4 x + 21

x^{2} = - 4 x + 21

Solve

x^{2} = - 4 x + 21 : x = 3, x = - 7

x = 3, x = - 7

Verify Solutions:

x = 3

True

, x = - 7

False

The solution is

x = 3

Popular Examples

2x+5=sqrt(4x^2+45)

2 x + 5 = 4 x^{2} + 45

solvefor x,ysqrt(5-2x)-3=-0 solve for

x, y 5 - 2 x - 3 = - 0

sqrt(2-7x)+2=sqrt(5x+1)+3

2 - 7 x + 2 = 5 x + 1 + 3

x + 6 = - 2

sqrt(3)x+4+1=sqrt(5x+5)

3 x + 4 + 1 = 5 x + 5

Frequently Asked Questions (FAQ)

What is the answer to x=sqrt(-4x+21) ?
The answer to x=sqrt(-4x+21) is x=3
Solve for x: x=sqrt(-4x+21)
The solution is x=3