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OpenStudy (anonymous):
factor 5x^2-21x-20
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OpenStudy (cwrw238):
(5x )( x ) -5 and + 4 go into the spaces in each bracket - can you see where?
OpenStudy (cwrw238):
the 5 multiples -5 to give -25 and 4 multiplis 1 to give +4 -25 + 4 = -21
OpenStudy (cwrw238):
its (5x + 4)(x - 5 )|dw:1339878773455:dw|
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