= 9a²/16 + 12aq/4 + 3q²
= t² - t - 6
(a + 2)(a + 3) = a² + a (2 + 3)+(2)(3)
(x² + 5)(x² + 3) = (x²)² + x²(5 + 3) + (5)(3)
= x² + 11x + 24
(x + 3)(x + 8) = x² + x(3 + 8) + (3)(8)
(6x - 3)(6x + 5)= (6x)² + 6x(-3 + 5) + (-3)(5)
(t + 2)(t - 3) = t² + t (2 – 3) + (2)(-3)
(3a/5 – 5b)(3a/5 + 8b) = (3a/5)² + 3a/5 (- 5b + 8b) + (- 5b)(8b)
(3p/4 + 3q)(3p/4 + q) = (3a/4)² + 3a/4 (3q + q) + (3q)(q)
(9x – 4)(9x + 11) = = (9x)² + 9x (- 4 + 11) + (- 4)(+11) =
= x⁴ + 8x² + 15
= 81x² + 63x - 44
= 36x² - 12x - 15
= a² + 5a + 6
= 9a²/25 – 9ab/5 – 40b²
