(x + 2)2 – (x + 4)2
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Answer:
(x+2)²-(x+4)².
(x+2)².
It is in the form of (a+b)²=a²+2ab+b² where a=x & b=2.
(x+2)²=(x)²+2(x)(2)+(2)².
=x²+4x+4.
(x+4)².
It is in the form of (a+b)²=a²+2ab+b² where a=x & b=4.
(x+4)²=(x)²+2(x)(4)+(4)².
=x²+8x+16.
(x+2)²-(x+4)²=(x²+4x+4)-(x²+8x+16). (Because (x+2)²=x²+4x+4 & (x+4)²=x²+8x+16).
=x²+4x+4-x²-8x-16. (Because -×+=-).
=+4x+4-8x-16.
=+4x-8x+4-16.
=-4x-12. (Because +×-=- & largest number is important).
(or).
=-(4x+12).
I think this is your answer.
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