Mathematics
The equation √15 - 2x = x. Assertion (A): x = 3. Reason (R): √(15 − 2x) = x ⇒ 15 − 2x = x² ⇒ x² - 2x − 15 = 0 ⇒ x = −5 or x = 3 1. A is true, R is false. 2. A is false, R is true. 3. Both A and R are true and R is correct reason for A. 4. Both A and R are true and R is incorrect reason for A.
Related Questions
If x2 - 7x = 0, the value of x is :
7
0
0 and 7
0 or 7
A quadratic equation ax2 + bx + c = 0 ; where a, b and c are real numbers and a ≠ 0.
Assertion (A): The roots of equation 2x2 + 5x - 3 = 0 are real and unequal.
Reason (R): For the equation ax2 + bx + c = 0, the roots are real and unequal if b2 - 4ac > 0.
A is true, R is false.
A is false, R is true.
Both A and R are true and R is correct reason for A.
Both A and R are true and R is incorrect reason for A.