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makkiz [27]
3 years ago
14

Evaluate the expression: 3c - 6d where c = 7 and d = -4

Mathematics
1 answer:
enyata [817]3 years ago
5 0

Answer:

45

Step-by-step explanation:

(3)(7)−(6)(−4)

=21−(6)(−4)

=21−(−24)

=45

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Answer:

The equations shows a difference of squares are:

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Step-by-step explanation:

the difference of two squares is a squared number subtracted from another squared number, it has the general from Ax² - By²

We will check the options to find which shows a difference of squares.

1) 10y²- 4x²

The expression is similar to the general form, so the equation represents a difference of squares.

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2) 6y²- x²

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3) 8x²−40x+25

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4) 64x²-48x+9

The expression is not similar to the general form, so the equation does not represent a difference of squares.

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3 years ago
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