Question

expand (2/3x+4/5y-1/7)square​

Answer 1

Answer:

Step-by-step explanation:

We can do this by the formula of (a+b+c) ^2 = a^2+b^2+c^2+2ab+2bc+2ca

(3x+5y-2z)^2= (3x)^2+(5y)^2+(-2z)^2+(2×3x×5y)+{2×5y×(-2z)}+{2×(-2z)+3x}

= 9x^2+25y^2+4z^2+30xy-20yz-12zx

Hope it helps you!