(20-1-6-2)2 = 112 = 121
2a to the second power. If you combine the like terms, (a to the second power + a to the second power), it would be the same as 2a to the second power.
12 to the second power is 144...2 to the second power is 4, any # to the second power is the # times itself.
8x to the second power is 64x2
27
what is 7x to the third power + 6x to the second - 2
The exponent is 2 - from the SECOND power.
36y to the second power
18 to the second power is 324. 18 to the second power can also be expressed as 18 squared.
208,000,000
x
68 to the second power is 4624 68x68=4624
Three squared to the second power is 81.