Question

Find the product of
(2x-3) (4x+5)​

Answer 1

Answer:

(8×2+14x-15)

Step-by-step explanation:

(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]