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What is the expansion of ( (x+6)(x-2) )?

Answer and explanation

Correct answer: (x^2+4x-12)

The product of two binomials can be expanded by multiplying every term in the first bracket by every term in the second bracket. In \\((x+6)(x-2)\\), the products are \\(x\cdot x=x^2\\), \\(x\cdot(-2)=-2x\\), \\(6\cdot x=6x\\), and \\(6\cdot(-2)=-12\\). Combining the middle terms gives \\(-2x+6x=4x\\).

Therefore, the complete expansion is \\(x^2+4x-12\\), so option B is correct. A useful check is the pattern \\((x+r)(x+s)=x^2+(r+s)x+rs\\). Here, \\(r+s=6-2=4\\) and \\(rs=6(-2)=-12\\). Option A incorrectly adds 6 and 2, ignoring the negative sign.

Related tags

Product IdentitySigned ConstantsExpansion

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