3.14 times 7 squared is equal to 153.86
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To square a number, multiply it by itself, so 7 squared, also written as 72, is 7 x 7, or 49.
(9x2 + 7)(9x2 - 7) = 81x4 - 49
3 squared is 9, 5 squared is 25. So the product is 225.
Oh, dude, when you add 6x squared and 2x squared, you get 8x squared. It's like combining 6 apples with 2 apples and ending up with 8 apples. So, in math terms, 6x squared plus 2x squared equals 8x squared. Easy peasy!
The square root of 28 minus the squared root of 7 =±2.64575131