Multiple choice

If one of the roots of the equation ax2+x-3=0 is -1.5, then what is the value of a ? यदि समीकरण ax2+x-3=0 के मूलों में एक मूल -1.5 है तो a का मान क्या है?

  1. 4

  2. 3

  3. 2

  4. -2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If x = -1.5 is a root of ax² + x - 3 = 0, then substituting gives a(-1.5)² + (-1.5) - 3 = 0. This simplifies to 2.25a - 4.5 = 0, giving 2.25a = 4.5, so a = 2. Verification: 2(2.25) - 4.5 = 4.5 - 4.5 = 0. The distractor 3 would result from incorrectly calculating (-1.5)² as 1.5 instead of 2.25.

Keep practicing — related questions