48x^2 + 84x -558 solve by middle term splitting
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Answer:
7 {x}^{2} + 49x + 847x
2
+49x+84
= 7 {x}^{2} + 28x + 21x + 84=7x
2
+28x+21x+84
= 7x(x + 4) + 21(x + 4)=7x(x+4)+21(x+4)
= (7x + 21)(x + 4)=(7x+21)(x+4)
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