Question

Show that m || n if the angles have measurements given below. give reasons . solve :-

(a) ∆ 3= 8x --7° , ∆6 = 6 x + 21° , x = 14 .

(b) ∆1 = 4x + 3° , ∆5 x -- 22° , x = 25 .

(c) ∆4 = 2x + 15° , ∆ 6 = 3 x + 15° , x = 30 .​

Answer 1

Answer:

(2a + 2b - 3)²

Step-by-step explanation:

Let (a + b) = x

Then our expression becomes

4x² - 12x + 9

= 4x² - 6x - 6x +. 9

= 2x(2x - 3) - 3(2x - 3)

= (2x - 3)(2x - 3)

= (2x - 3)²

Now put the original value of x

= [2(a + b) - 3)]²

= (2a + 2b - 3)²