25-(4x²+12x+9)... Factorise it
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Answer:
Step-by-step explanation:
25 - (4x² + 12x + 9 ) = 0
25 = 4x² + 12x +9
0 = 4x² + 12x + 9 -25
4x² + 12x - 16 = 0
4 ( x² + 3x -4 ) = 0
X² + 3x - 4 = 0
X² + 4x - x - 4 = 0
X ( x+4) -1(x+4) = 0
X-1 = 0. , X + 4 =0
X=1. , X = -4
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