Work Step by Step
$4m^2-27m-40=0$ $4m^2+5m-32m-40=0$ $m(4m+5)-8(4m+5)=0$ $(m-8)(4m+5) = 0$ $m-8 = 0$ $m-8+8 = 0+8$ $m = 8$ $4m+5 = 0$ $4m+5-5 = 0-5$ $4m = -5$ $4m/4 = -5/4$ $m = -5/4$
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