Question

Find the square of( 5x +3y -4z)​

Answer 1

Answer:

25x²+9y²+16z²+30xy-24yz-40zx

Step-by-step explanation:

as we know that, (a+b+c)²= a²+b²+c²+2ab+2bc+2ac

so, ( 5x +3y -4z)² =

(5x)²+(3y)²+(-4z)²+2(5x)(3y)+2(3y)(-4z)+2(-4z)(5x)=

25x²+9y²+16z²+30xy-24yz-40zx

Answered by Gauthmath

Answer 2

Answer:

25x^2 + 9y^2 + 16y^2 + 30xy - 24yz - 40yz

Step-by-step explanation:

(5x + 3y - 4z)^2

Using the formula :-

(a+b+c)^2 = a^2 + b^2 + c^2 + 2ab + 2bc + 2ca

(5x + 3y - 4z)^2 = (5x)^2+(3y)^2+ (-4z)^2 + 2(5x)(3y)+2(3y)(-4z) + 2(-4z)(5x)

                         =  25x^2 + 9y^2 + 16y^2 + 30xy - 24yz - 40yz