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Mathematics
Algebra
Quadratic Equations
x2 – 10x + 21 = 0
2 answers
x^2-10x+21 = (x-7)(x-3)
To factor x^2-10x+21, we need to find two numbers that multiply to 21 and add up to -10. Those numbers are -3 and -7. Therefore,
x^2-10x+21 = (x-3)(x-7)
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