9 plus 16=25
3 squared is the same as 3 times three and 4 squared is the same as 4 times 4
3 times 3 + 4 times 4
9 plus 16 = 25
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285
1 squared (1x1) +3=4
Assuming the thing is as written and there are no brackets missed out then it is just 4 squared times 3 = 16x3=48.
That is 9 + 16 + 5 which is 30.
If you're solving for b, then you use the quadratic formula to factor out b. In this case, b= -1/4 or -18/12