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Diana0920
how can I factor 2x^2-X-10?
multiply first/last --> 2*-10 = -20 find 2 factors of -20 that add up to "middle coefficient" -1
correct now split up the "-x" into "4x -5x" then factor by grouping
that's what I don't quite understand
ok once you get factors rewrite it 2x^2 +4x -5x -10 split into 2 groups (2x^2 +4x)+(-5x-10) factor each group 2x(x +2)-5(x+2) pull out common factor of "x+2" (x+2)(2x-5) done
that easy?! Thanks! (:
thats it....use same steps for any quadratic factoring prablem