Solve the following quadratic equations using factorization:
⇒ (15x + 19)(x + 2) = (12x2 + 64x + 20)
⇒ 15x2 + 19x + 30x + 38 = 12x2 + 64x + 20
⇒ 15x2 + 49x + 38 = 12x2 + 64x + 20
⇒ 15x2 – 12x2 + 49x – 64x + 38 – 20 = 0
⇒ 3x2 – 15x + 18 = 0
⇒ 3x2 – (18 – 3)x + 18 = 0
⇒ 3x2 – 18x – 3x + 18 = 0
⇒ 3x(x – 6) – 3(x – 6) = 0
⇒ (3x – 3)(x – 6) = 0
⇒ x = 1 or x = 6.
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