Question

Add the following :
i) $5y^3,26y^3,10y^3,-3y^3$
ii) $3x^2,-10x^2,4x^2$
iii) $4x^{2}y,-3x{y}^2,-5x{y}^2,5x^{2}y$

• A. (i) $38y^3$ (ii) $-3x^2$ (iii) $8x^{2}y-9x{y}^2$
• B. (i) $38y^3$ (ii) $-3x^2$ (iii) $9x^{2}y-8x{y}^2$
• C. (i) $41y^3$ (ii) $-3x^2$ (iii) $9x^{2}y-8x{y}^2$
• D. None

Answer 1

The correct option is B (i) $38y^3$ (ii) $-3x^2$ (iii) $9x^{2}y-8x{y}^2$

i)

$5y^3,26y^3,10y^3,-3y^3$

$5y^3+26y^3+10y^3-3y^3$

$y^3(5+26+10-3)$

$38y^3$

ii)

$3x^2,-10x^2,4x^2$

$3x^2-10x^2+4x^2$

$x^2(3-10+4)$

$-3x^2$

iii)

$4x^{2}y,-3x{y}^2,-5x{y}^2,5x^{2}y$

$4x^{2}y-3x{y}^2-5x{y}^2+5x^{2}y$

$4x^{2}y+5x^{2}y-3x{y}^2-5x{y}^2$

$9x^{2}y-8x{y}^2$