Question

f) (4a - 5b) (3a + 2b – 7)​

Answer 1

Following are the steps for getting the answer:

Given:

(4a - 5b) (3a + 2b – 7)​

To find:

(4a - 5b) (3a + 2b – 7)​=?

Solution:

we have to solve the given expression (4a - 5b) (3a + 2b – 7)​

so, we will multiply second bracket by first.

=4a(3a + 2b – 7)​-5b(3a + 2b – 7)​

=12a²+8ab-28a-15ab+10b²-35b

=12a²+10b²+8ab-45ab-28a-35b

=12a²+10b²-37ab-28a-35b

thus, the answer of  (4a - 5b) (3a + 2b – 7) is ​12a²+10b²-37ab-28a-35b

Answer 2

Given,

$(4a-5b)(3a+2b-7)$

We have to simplify the given expressions

We have to use distribution property of multiplication to solve the above expression

$(4a-5b)(3a+2b-7)$

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

$= 12a^{2}+8ab-28a-15ab-10b^{2}+35b$

$= 12a^{2} -10b^{2}-7ab-28a+35b$

Therefore, the answer is $12a^{2} -10b^{2}-7ab-28a+35b$.