2) 1.2 x 10,000 - 1.5 x 1,000 - 2.2 x 100 = 10,280 3) 7.3 x 100,000 + 1.6 x 1,000,000 + 4.7 x 100,000 = 2,800,000 4) 8.2 x 10,000 - 2.4 x 10,000 - 1.5 x 1,000 = 56,500 5) 2.4 x 1,000 + 3.4 x 10,000 + 1.5 x 1,000 = 37,900 6) 6.2 x 10,000 - 3.4 x 100 - 7.5 x 1,000 = 54,160 7) 8.3 x 100,000 + 1.6 x 10,000,000 + 6.7 x 10,000 = 16,897,000 8) 8.0 x 1,000 - 0.8 x 1,000 - 1.2 x 100 = 7,080
Notice the x^-2, this is equal to 1/x^2. Then notice the y^0, any value raised to the zero power is equal to 1, ie n^0=1. So your expression is actually just:
8/x^2, the y value has no effect upon the output. They want you to evaluate, which must means calculate, the value when x=2 so:
