plz help me solve this
Attachments:
Answers
Answered by
1
Answer:
319x^2 +748x +220.
Step-by-step explanation:
4^2(5x + 4)^2 - 3^2 (3x - 2)^2
= {4(5x+4)}^2 - {3(3x - 2)}^2
=[{4(5x +4)} + 3(3x-2)] [4(5x +4) - {3(3x - 2)}]
= [20x + 16 + 9x - 6] [20x + 16 - (9x - 6)]
= [29 x + 10] [20x + 16 - 9x + 6]
= [29 x + 10] [ 11x + 22]
= 29x (11x + 22) + 10 (11x + 22)
= 319 x^2 + 638x + 110x + 220
= 319x^2 + 748x + 220.
Answered by
0
Answer:
16(25x^2+40x+16)-9(9x^2-12x+4)
400x^2+640x+256-81x^2+108x-36=0
319x^2+748x+220=0
b^2-4ac=
559504-280720=278784
root of 278784=528
x=-b+-root of b^2-4ac/2a
x=-748+528/2*319
=-220/638=-110/319=
0r
x=-748-528/638=-2044/638=-1022/319
Step-by-step explanation:
Similar questions