Subtract : `3 xy + 5 yz - 7 zx ` from `5 xy - 2 yz - 2 zx + 10 xyz`

Subtact 3 xy + 5 yz - 7x from 5 xy - 2 yz - 2zx + 10 xyz solving using column method, we have.

Subtract 3xy + 5yz – 7zx from 5xy – 2yz – 2zx + 10xyz

Subtract: 6xy from –12xy

Subtract 5x^2 – 4y^2 + 6y – 3 from 7x^2 – 4xy + 8y^2 + 5x – 3y .

Subtract 2/5 from 5/7.

Subtract: – x^2 + 10x – 5 from 5x – 10

Statement I If tan^(-1) x + tan^(-1) y = pi/4 - tan^(-1) z " and " x + y + z = 1 , then arithmetic mean of odd powers of x, y, z is equal to 1/3 . Statement II For any x, y, z we have xyz - xy - yz - zx + x + y + z = 1 + ( x - 1) ( y - 1) ( z - 1)

Subtract: 5a^2 – 7ab + 5b^2 from 3ab – 2a^2 – 2b^2

Add: 7xy + 5yz – 3zx, 4yz + 9zx – 4y , –3xz + 5x – 2xy.