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Find the product:(4x – 3) (2x + 5) |
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Answer» (4x – 3) (2x + 5) Suppose (a – b) and (c + d) are two binomials. By using the distributive law of multiplication over addition twice, we may find their product as given below. (a – b) × (c + d) = a × (c + d) – b × (c + d) = (a × c + a × d) – (b × c + b × d) = ac + ad – bc – bd Let, a= 4x, b= 3, c= 2x, d= 5 Now, = 4x × (2x + 5) -3 × (2x + 5) = [(4x × 2x) + (4x × 5)] – [(3 × 2x) + (3 × 5)] = [8x2 + 20x – 6x – 15] = [8x2 + 14x – 15] |
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