(2x+3)(x+3)
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3(x2 + 3x + 1)
(x + 12)(x - 3)
Factor as : (x+9)(x+10) using the first terms ( x terms) multiply to x2; the last terms multiply to 90; the sum of 9x + 10 x = 19x
9x2+2x-7 = (9x-7)(x+1) when factored
In one bracket, write 16 times the square root of 2 minus 3x. In the other one, write 16 times the square root of 2 plus 3x.