10. If A = 4x³ + 3x - 19, B = x³ + 8x² - 7x + 13 and C=-5x³- 6x +20, find
(i) A+B-C.
(ii) A-B+C.
(iii) A-B- C.
Share
10. If A = 4x³ + 3x - 19, B = x³ + 8x² - 7x + 13 and C=-5x³- 6x +20, find
(i) A+B-C.
(ii) A-B+C.
(iii) A-B- C.
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
[tex]1) = A+B-C \\ \\ = 4 {x}^{3} + 3x - 19 + {x}^{3} + 8 {x}^{2} \\ - 7x + 13 - ( - {5x}^{3} - 6x + 20) \\ \\ = 5 {x}^{3} - 4x - 6 + 5 {x}^{3} \\ 8+ 6x - 20 \\ \\ = 10 {x}^{3} + 2x - 26[/tex]
[tex]1) = A - B + C \\ \\ = 4 {x}^{3} + 3x - 19 + {x}^{3} + 8 {x}^{2} \\ - 7x + 13 + ( - {5x}^{3} - 6x + 20) \\ \\ = 5 {x}^{3} + 11 x - 6 -5 {x}^{3} \\ - 6x + 20 \\ \\ = 11 {x}^{2} - 5x + 14[/tex]
[tex]1) = A - B-C \\ \\ = 4 {x}^{3} + 3x - 19 - {x}^{3} + 8 {x}^{2} \\ - 7x + 13 - ( - {5x}^{3} - 6x + 20) \\ \\ =3 {x}^{3} - 4x - 6 + 5 {x}^{ 3} \\ + 6x - 20 \\ \\ = 8 {x}^{3} + 2x - 26[/tex]