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Answer:
(i) 15x^2 + 14x - 8
(ii) 29p - 12p^2 - 14 OR 12p^2 - 29p + 14
(iii) 2.25a^2 - 6.25b^2
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Step-by-step explanation:
(i) (5x−2) by (3x+4)
= (5x−2)×(3x+4)
= 5x(3x+4)−2(3x+4)
= 15x2 +20x−6x−8
= 15x2 +I4x−8
(ii) (4P−7) by (2−3p)
= (4p−7)×(2−3p)
= 4p(2−3p)−7(2−3p)
= 8p−12p 2 −14+21p
= 29p−12p2 −14
(iii) (1.5a−2.5b) by (1.5a+2.5b)
= (1.5a−2.5b) (1.5a+2.5b)
= 1.5a(1.5+2.5b)−2.5b (1.5a+2.5b)
= 2.25a2 +3.75ab−3.75a6 −6.25b2
= 2.25a2 −6.25b2
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