Question

(2x +3a -y+z) (2x+3a+y +z)​

Answer 1

Step-by-step explanation:

(2x + 3a - y + z)(2x + 3a + y + z)

= 4x² + 6ax + 2xy + 2xz + 6ax + 9a² + 3ay + 3az - 2xy - 3ay - y² - yz + 2xz + 3az + yz + z²

= 4x² + 9a² - y² + z² + 6ax + 6ax + 2xy - 2xy + 2xz + 2xz + 3ay - 3ay + 3az + 3az - yz + yz

= 4x² + 9a² - y² + z² + 12ax + 4xz + 6az

Answer 2

By using the method :

(a + b - c + d) (a + b + c + d)

=>a(a + b + c + d) + b(a + b + c + d)

- c(a + b + c +d) + d(a + b +c +d )

U will get ur answer

HOPE IT HELPS U..........

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