x*2+10x+21=0

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Solution for x*2+10x+21=0 equation:


Simplifying
x * 2 + 10x + 21 = 0

Reorder the terms for easier multiplication:
2x + 10x + 21 = 0

Reorder the terms:
21 + 2x + 10x = 0

Combine like terms: 2x + 10x = 12x
21 + 12x = 0

Solving
21 + 12x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + -21 + 12x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 12x = 0 + -21
12x = 0 + -21

Combine like terms: 0 + -21 = -21
12x = -21

Divide each side by '12'.
x = -1.75

Simplifying
x = -1.75

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