Question

1• simplify (x² - 3) (3x² - x + 1) - (x - 2) (x² + 5x - 9)​

Answer 1

Step-by-step explanation:

Firsty, we should solve first two brackets and then next two, OK

(3x⁴-9x²-x³+3x+x²-3)-(x³-2x²+5x²-10x-9x+18)

therefore, (3x⁴-x³-8x²+3x-3)-(x³+3x²-19x+18)

Now, negative (-) sign is here between two brackets. So, sign is change of second bracket

3x⁴-x³-8x²+3x-3-x³-3x²+19x-18

so, (3x⁴-2x³-11x²+22x-21).

THIS IS THE FINAL ANSWER