Question

(iv) 3х^2 - y^2 from 5х^2 - 2y + 3у^2 subtract​

Answer 1

$\sf{\left(5x^2-2y+3y^2\right)-\left(3x^2-y^2\right)}$

$\sf{=5x^2-2y+3y^2-\left(3x^2-y^2\right)}$

$\sf{=5x^2-2y+3y^2-3x^2+y^2}$

$\sf{=3y^2+y^2-2y+5x^2-3x^2}$

$\sf{=3y^2+y^2-2y+2x^2}$

$\sf{=4y^2-2y+2x^2}$