Question

Subtract : i) x - 3xy + 7y² - 2 from 6xy - 4x² - y² + 5

ii) x³−2x²+x+4 from 2x³+7x²-5x+6.


please guys, help it is very urgent.

and please solve it in a page n then share the answer.
Thank you.....​

Answer 1

Answer:

second question ka answer bhe isma hai

Answer 2

$\huge\bold{\gray{\sf{Answer:}}}$

Explanation:

concept:

whenever Question said substance this value say 'x' from this value say 'z' then in such case we have to write 'z' first and then substance 'x' from it.e.g.=> z-x

$\huge\bold{\red{i) }}$

$= >6xy - 4 {x}^{2} - {y}^{2} + 5 - (x - 3xy + 7 {y}^{2} - 2)$

$= 6xy + 3xy - 4 {x}^{2} - x - y - 7 {y}^{2} + 5 + 2$

$= 9xy - 4 {x}^{2} - x - 8 {y}^{2} + 7$

$\bold{\purple{= 9xy - x(4x - 1) - 8 {y}^{2} + 7}}$

$\huge\bold{\red{ii) }}$

$= > 2 {x}^{3} + 7 {x}^{2} - 5x + 6 - ( {x}^{3} - 2 {x}^{2} + x + 4)$

$= 2 {x}^{3} - {x}^{3} + 7 {x}^{2} + 2 {x}^{2} - 5x - x + 6 - 4$

$= {x}^{3} + 9 {x}^{2} - 6x + 2$

$\bold{\purple{= {x}^{3} + 3x(3x - 2) + 2}}$