Question

(2a+5b)(3a+4b)-(7a+3b)(2a+5b)​

Answer 1

Answer:

6a^2+8ab+15ab+20b^2-(14a^2+35ab+6ab+15b^2)

5b^2-8a^2-18ab

Answer 2

Answer:

(2a + 5b) (-4a + b)

Step-by-step explanation:

(2a+5b)(3a+4b) - (7a+3b)(2a+5b)​

STEP 1: Take out common factor (2a + 5b)

(2a+5b)(3a+4b) - (7a+3b)(2a+5b)​

= (2a + 5b) [ (3a + 4b) - (7a + 3b) ]

STEP 2: Evaluate the terms in the bracket

(2a + 5b) [ (3a + 4b) - (7a + 3b) ]

= (2a + 5b) [ 3a + 4b - 7a - 3b ]

= (2a + 5b) (-4a + b)

Answer: (2a + 5b) (-4a + b)