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2 Select the correct answer. What is the product of (x-3) and (x + 7)? OA. x2 + 10X-21 O B. x2 + 4x-21 Oc. &- 4X-21 OD. x - 10x-21 Reset Next

Sagot :

[tex](x-3)(x+7)[/tex]

multiply each term by each term and sum the results

[tex]\begin{gathered} (x\times x)+(x\times7)+(-3\times x)+(-3\times7) \\ x^2+7x-3x-21 \\ x^2+4x-21 \end{gathered}[/tex]

so, the right option is B

the right option is A because

[tex]h^2+h-2[/tex]

if we factor this expression by any way we obtain

[tex](h+2)(h-1)[/tex]

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