Question

please help me to everyone class ninth math ​

Answer 1

Bhai tune 2 gazab ke questions diye hai aur sirf 5 points rakha hai ....koi jaldi answer nahi karna chahega

Bhai tune 2 gazab ke questions diye hai aur sirf 5 points rakha hai ....koi jaldi answer nahi karna chahegaStep-by-step explanation:

Isliye kam se kam 15-20 points rakh in question pe!!!!!!

Hope everyone agrees with me:)

Thankyou

Answer 2

Answer:

13. [x - y - z ]² = x²+(-y²)+(-z²)+ 2xy-2yz-2zx

= (2x)²-(3y)²-(2z)²-2xy-2yz-2zx

= 4x²-9y²-4z²+2(2x)(-3y)+2(-3y)(-2z)+2(-2z)(2x)

= 4x²-9y²-4y²-12xy-12yz-8zx