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Look at the following expression:

$(3x - 5)(6x + 7)$

Which is an equivalent expression?

1. $18x^2 - 9x - 35$
2. $18x - 9x - 35$
3. $18x - 9x + 35$
4. $18x^2 + 9x - 35$

Answer :

To solve this problem, we need to expand the given expression [tex](3x - 5)(6x + 7)[/tex] using the distributive property, often referred to as FOIL (First, Outside, Inside, Last) when dealing with two binomials.

Step-by-step, here's how it's done:


  1. First Terms: Multiply the first terms in each binomial:
    [tex]3x \times 6x = 18x^2[/tex]


  2. Outside Terms: Multiply the outer terms in the expression:
    [tex]3x \times 7 = 21x[/tex]


  3. Inside Terms: Multiply the inner terms in the expression:
    [tex]-5 \times 6x = -30x[/tex]


  4. Last Terms: Multiply the last terms in each binomial:
    [tex]-5 \times 7 = -35[/tex]



Now, combine all these results into one expression:

[tex]18x^2 + 21x - 30x - 35[/tex]

Combine like terms (i.e., the [tex]x[/tex] terms):

[tex]18x^2 + (21x - 30x) - 35 = 18x^2 - 9x - 35[/tex]

Thus, the expression equivalent to [tex](3x - 5)(6x + 7)[/tex] is:

[tex]18x^2 - 9x - 35[/tex]

Therefore, the correct multiple-choice option is:

Option 1: [tex]18x^2 - 9x - 35[/tex].

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