Solve the equation 25X & # 178; + 90x-144 = 0
(5x+9)²=225=15²
5x + 9 = 15 or - 15
5x = 6 or - 24, x = 1.2 or - 4.8
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- 12. 25X & # 178; - 16y & # 178; factoring, urgent, how to ask, forget~
- 13. X-0.25x = 3
- 14. (25x)²+120²=(65x)²
- 15. Decomposition factor 1.3x & # 178; y-6xy = 2.5x & # 178; Y & # 179; - 25X & # 179; Y & # 178= 1.3x²y-6xy= 2.5x²y³-25x³y²=
- 16. (1) ± √ 169 (2) √ 0.25 (3) - √ 121 / 225 (4) x & # 178; = 1.44 (1) ± √ 169 (2) √ 0.25 (3) - √ 225 / 121 (4) x & # 178; = 1.44 (5) 9x & # 178; = 49 (6) 2 (X-2) 178; - 72 = 0 (7) √ X-2 (8) √ (x-1) 178; (9) √ - X & # 178; (10) √ x + 1 / 3 After answer, will give certain integral
- 17. (X-2) & 178; - 169 / 4 = 0
- 18. Solve inequality 1, X & # 178; + 2 > 3x 2, 7-x / x-3 > 13, X & # 178; - 26x + 169 > 0
- 19. Given X & # 178; - 3x + 1 = 0, find the value of 2x & # 178; / X Λ 4-3x & # 178; + 1
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