17x + 9
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x2 + 13x + 36 = 0 so (x+4)(x+9) = 0 so that x = -4 or x = -9
7x + 7 + 6x - 9 = 13x - 2
The factorisation is as follows: 4x² + 12x + 9 = (2x + 3)2.
4x + 3y=9 x=0 y=3
4x + 9 = 254x = 25 - 94 x = 16x= 16/4x= 4