Answer:
x2 + 7x + 12 = 0
Step-by-step explanation:
(x + 4) (x + 3)
x + 4 = 0 or x + 3 = 0
x = - 4 or x = - 3
1/8 because 1/4 x 1/2 = 1/8
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15b + 30
By expansion (6 x 2.5b) + (6 x 5)
= 15b + 30