Mathematics
OpenStudy (anonymous):

30to the second power + 18 to the second power equals ?

1224

OpenStudy (anonymous):

$30^2 = 30 \cdot 30 = 900$$18^2 = 18 \cdot 18$$= (10 + 8)(10+8)$$= 100 + 2(80) + 64 = 100 + 160 + 64 = 324$ $\implies 30^2 + 18^2 = 900 + 324 = 1224$ Didn't want to bother getting out the calculator, sorry

OpenStudy (amistre64):

thats a lot of variables ...