Solve x2 — 10x + 21 = 0 by using middle term splitting method.
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(x-3) (x-7)
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Answer:
x2 - 10x + 21
x2 - (7x + 3x) + 21
NOW OPEN THE BRACKETS.
x2 - 7x - 3x + 21
x ( x - 7 ) - 3 ( x - 7 )
( x -3 )( x - 7)
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