Question

5- From the sum of 9x2 - 12x + 4 and --4x2 + 5x + 8 subtract 9x2 - 10x + 12
[ Marks​

Answer 1

Step-by-step explanation:

9x2-12x+4

-4x2+5x+8

= -5x2-7x+12

*now we need to subtract 9x2-10x+12 from -5x2-7x+12

=-5x2-7x+12

9x2-10x+12

- + -

= - 14x2- 3x (ans)

Answer 2

Answer:

$-x$($4x$ - $3$)

Step-by-step explanation:

$9x^{2}$ - $12x$ +4 + ($-4x^{2}$ + $5x$ $+8$) - ($9x^{2}$ $-10x$ $+ 12$)

= ($9x^{2}$ $-4x^{2}$ $-9x^{2}$ ) + {$-12x$ $+5x$ $-(-10x)$} + (4 + 8 - 12)

=$-4x^{2}$ + $3x$ + 0

=$-x$($4x$ - $3$)