Question

(-4a - 3b + 5c )² find using identity​

Answer 1

Answer:

4a^2 +3b^2 -2×4a×3b

=>16a^2+9b^2 - 24ab

Identity used:-

{(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab

cheers

Answer 2

Answer:

(-4a - 3b + 5c )² = (a-b+c)²

(a-b+c)² = a² + b² + c² -2ab -2bc + 2ca

a = -4a

b = 3b

c = 5c

a² + b² + c² -2ab -2bc + 2ca

= (-4a)² + (3b)² + (5c)² - (2*(-4a)*3b) - (2*(3b)*5c) + (2*(5c)*(-4a))

= 16a² + 9b² + 25c² - (-24ab) - (30bc) + (-40ca)

= 16a² + 9b² + 25c²+ 24ab - 30bc - 40ca