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6. Multiply: (x – 4)(x + 5)

(a) x2 + 5x - 20,

(b) x2 - 4x - 20,

(c) x2 - x - 20,

(d) x2 + x - 20.​

User Ed Sykes
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1 Answer

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25 votes


\mathbb{PROBLEM}

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\tt{6. Multiply:}{ ( * - 4)(x + 5)}

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\mathbb{ANSWER}


\tt{option. \: (d) \: * 2 + * - 20}

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\mathbb{SOLUTION}


\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \tt{( * - 4)( * + 5)}


\: \: \: \: \: \: \: \: \: \: \: \: \: \tt= x(x + 5) -4(x + 5)


\: \: \: \: \: \: \: \: \: \: \: \: \: \tt{ = * 2 + 5 * - 4 * - 20.}


\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \tt\underline \red{= \: x2 + x - 20.}


\tt{Answe r \: is \: Option \: (d)}

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User Thiago Arreguy
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