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h(-1) = ( -1 + 5 ) ( 2(-1)-1) = 4 x -3 = -12
h(-3) = (-3+5)(2(-3)-1) = 2.-7 = -14
h(x-1) = ((x-1)+5) (2(x-1)-1) = (x+4)(2x-2-1) = (x+4)(2x-3) = 2x²+5x-12