If (a + b) = 12 and ab = 14, then (a2 + b2) = ?

Q17 of 95 Page 94

If (a + b) = 12 and ab = 14, then (a² + b²) = ?

From the formula,

(a + b)² = a² + b² + 2ab

We get,

= a+ b = 12 and ab = 14

By putting values, we get,

12² = a² + b² + 2× 14

= a² + b² = 144 – 28 = 116.

(82)² – (18)² = ?

(197 × 203) = ?

If (a - b) = 7 and ab = 9, then (a² + b²) = ?

If x = 10, then find the value of (4x² + 20x + 25).