78 squared

78² = 78 × 78 = 6,084

To square a number, multiply it by itself. 78 squared is written 78² or 78^2, and the answer is 6,084.

How to work out 78 squared

• Direct: 78 × 78 = 6,084.
• From the previous square: 77² = 5,929, and 78² = 5,929 + (2 × 78 − 1) = 5,929 + 155 = 6,084.
• Split the number: 78 = 70 + 8, so 78² = 70² + 2 × 70 × 8 + 8² = 4,900 + 1,120 + 64 = 6,084.

Related

• 78 cubed = 474,552
• The square root of 6,084 is 78, so 6,084 is a perfect square.

Squares near 78

Need another number? Use the exponent calculator or see all squares and cubes.