Find the value of 2a² + 5b² when a = - 6 and b = 2

Plug in the values - 6 into 'a' and 2 into 'b'.

2a² + 5b²

2 (-6) ² + 5 (2) ²

First solve the exponents ⇒ - 6² means - 6 * - 6, which equals 36

2² = 2*2 = 4

2 (36) + 5 (4)

2*36 → 72

5*4 = 20

72 + 20 = 92

Final answer → 92

2 (-6^2) + 5 (2^2)

2 (36) + 5 (4)

72+20

92