SSC CPO 2020191)If x2 + 8y2 - 12y - 4xy + 9 = 0, then the value of (7x - 8y) is:
9
SSC CPO 2020192)If x2 - 5x + 1 = 0, then the value of \(\left(x^4 + \frac 1 {x^2}\right) \)\(\div \left(x^2 + 1\right)\) is:
22
SSC CPO 2020193)If x + y + z = 19, xyz = 216 and xy + yz + zx = 114, then the value of x3 + y3 + z3 + xyz is:
1225
SSC CPO 2020194)If x2 – 3x + 1 = 0, then the value of \( (x^4 + \frac{1}{x^2}) \div (x^2+1) \) is:
6
SSC CPO 2020195)If x + y + z = 17, xyz = 171 and xy + yz + zx = 111, then the value of \(\sqrt[3]{{(x^3+y^3+z^3+xyz)}} \) is:
-4
SSC CPO 2020196)The students of a class donated a sum of Rs. 2,809 to the Fund. Each student donated as many rupees as the number of students in the class. The number of students in the class is:
53
SSC CPO 2020197)If x2 + 8y2 + 12y - 4xy + 9 = 0, then the value of (7x + 8y) is:
-33
SSC CPO 2020198)If a2 + b2 + c2 + 84 = 4(a - 2b + 4c), then \(\sqrt {ab - bc + ca}\) is equal to:
\(2\sqrt {10}\)
SSC CPO 2020199)If a3 + b3 = 217 and a + b = 7, then the value of ab is:
6
SSC CPO 2020200)If x + y + z = 13, x2 + y2 + z2 = 133 and x3 + y3 + z3 = 847, then the value of \(\sqrt[3]{{xyz}}\) is:
-6