Question

2.
If A = 9x² - 6x4 and
B = 322
+ 8r - 6 Find
3 A +AB​

Answer 1

First solve 3A:

$3A=3(9x^{2} -6x+4)$

$= 27x^{2} -18x+12$

Now solve AB:

$(9x^{2} -6x+4)(322+8r-6)$

$9x^{2}(322+8r-6)-6x(322+8r-6)+4(322+8r-6)$

$2898x^{2}+72x^{2}r-54x^{2}-1932x-48xr+36x+1288+32r-24$

$2844x^{2}+72x^{2}r-1896x-48xr+1264+32r$

Now solve 3A+AB:

$27x^{2}-18x+12+2844x^{2}+72x^{2}r-1896x-48xr+1264+32r$$2871x^{2} -1914x+1276+72x^{2}r-48xr+32r$

This is the most simplified version of the answer. Hope it helped!

Please mark me as the brainliest, I really went through a lot of effort to answer this question!