7
2
-2
-7
Correct answer is B
\(a * b = a^{2} + b + ab\)
\(5 * x = 5^{2} + x + 5x = 37\)
\(25 + 6x = 37 \implies 6x = 12\)
\(x = 2\)
Find the equation to the circle \(x^{2} + y^{2} - 4x - 2y = 0\) at the point (1, 3)....
If the sum of the roots of 2x\(^2\) + 5mx + n = 0 is 5, find the value of m...
Evaluate \(\int_{-1}^{1} (x + 1)^{2}\mathrm {d} x\). ...
Solve: \(3^{2x-2} - 28(3^{x-2}) + 3 = 0\)...
Simplify \(\frac{\sqrt{3}}{\sqrt{3} -1} + \frac{\sqrt{3}}{\sqrt{3} + 1}\)...
Evaluate \(\int_{1}^{2} (2 + 2x - 3x^{2}) \mathrm {d} x\)....
Find the equation of a circle with centre (-3, -8) and radius \(4\sqrt{6}\)...
A fair die is tossed twice. Find the probability of obtaining a 3 and a 5. ...
If log 5(\(\frac{125x^3}{\sqrt[ 3 ] {y}}\) is expressed in the values of p, q and k respec...