Question

Maths class 8th
Q - (1.5x - 4y ) (1.5x - 4y +3 ) 4.5x + 12y

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Answer 1

Answer:

= 2.25x² - 16y²

Step-by-step explanation:

=(1.5x−4y) (1.5x+4y+3) − 4.5x + 12y

=(1.5x) (1.5x) + (1.5x) (4y) + (1.5x) (3) − (4y) (1.5x) − (4y) (4y) − 4y × 3 − 4.5x + 12y

=2.25x² + 6xy + 4.5x − 6xy − 16y² − 12y − 4.5x + 12y

= 2.25x² - 16y²

Hope it helps :)

Answer 2

Step-by-step explanation:

$solution$

According to question

(1.5x - 4y)(1.5x + 4y + 3) - 4.5x + 12y

=1.5x*1.5x+1.5x*4y+1.5x*3-4y* 1.5x - 4y * 4y - 4y * 3 - 4.5x + 12y

=2.25 x^ 2 +6xy+4.5x-6xy-16y^ 2 -12y-

4.5x + 12y

=2.25x^ 2 +6xy-6xy+4.5x-4.5x-16y^ 2 -

12y + 12y

=2.25x^ 2 -16y^ 2

=(1.5x)^ 2 -(4y)^ 2

=(1.5x-4y)(1.5+4y)

hope it helps youu me to 8th standard