Solve quadratic equations using formula.
m2 - 14 m + 13 = 0
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Solution : m2 - 14 m + 13 = 0 comparing
with ax2 + bx + c = 0
we get a = 1, b = -14, c = 13,
\ b2 - 4 ac = (-14)2 - 4 ´ 1 ´ 13
= 196 -52
= 144
:solve by using formula
m = 13 or m = 1
13 and 1 are roots of the equation.
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