CUET Preparation Today
CUET
General Test
Quantitative Reasoning
Algebra
If a - b = 3 and
a2 + b2 = 485,
then the value of ab is:
240
242
230
238
Given,
a - b = 3
a2 + b2 = 485
( a - b )2 = a2 + b2 - 2ab
9 = 485 - 2ab
ab = 238
