Question

If x + y = 12 and x2 + y2 = 94, then xy is
A) 25 B) 50 C) 144 D) 238

Answer 1

Step-by-step explanation:

Given -

• x + y = 12
• x² + y² = 94

To Find -

• Value of xy

Now,

→ x + y = 12

Squaring both sides :-

→ (x + y)² = (12)²

→ x² + y² + 2xy = 144

→ 2xy = 144 - 94

→ 2xy = 50

→ xy = 25

Hence,

The value of xy is 25.