identify the value of 1. (y + 4) (y + 3) ----> y2 + 7y + 12 =0 2.(r + 3) (r -4) ---> r2 -r -12 = 0 3.(2x -1)(x -2) ---> 2x2 -5x + 2 = 0 4.(m + 6)(m -6) --->m2 -36 = 0 5.(x + 5)2 ---> x2 + 8x + 16 = 0 6.(d-2)2 ---> d2 - 4d + 4 = 0