# How to solve the quadratic equation by completing the square and quadratic furmula

1
by cincodarwin

2015-07-02T00:10:36+08:00

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1) Find the formula...
x= -(b) +- (the square root of) (b)(squared) -4(a)(c)all over 2(a)
2) Determine the values a, b and c
x2 -10x = 0
a = 1 (all variable with no numerical coefficient = 1) b = -10 c = 0( if 'c' or 'b' is not shown to any equation = 0)
3) Substitute the value.
x = -(-10) +- (the square root of) (-10) squared - 4(1)(0) all over 2(1)
4) Simplify
x = 10 +- (the square root of) 100 - 0 all over 2
x = 10 +- 10 all over 2
5) Separate the two combining signs
x1 = 10 + 10  all over 2
x1 = 20 \20
x1 = 1
x2 = 10 - 10 all over 2
x2 = 0 \2
x2 = 0
Then that's it!!