Question

If x=−5 and y=4, evaluate the following expression:2(y−3xy)

Answer 1

[ Answer ]

- 112

[ Explanation ]

X = -5

Y = 4

Insert In The Numbers For X & Y

2 (4 - 3 * -5 * 4)

Multiply First:

3 * -5 * 4 = -60

Subtract

4 - -60 = -56

Multiply

2 * -56 = -112

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Answer 2

The value of the expression 2(y−3xy) is 128

What are algebraic expressions?

An expression obtained by a finite number of the fundamental operations of algebra upon symbols representing numbers.

How to evaluate the expression?

According to the problem,

• x= −5
• y =4

• The given expression is 2(y - 3xy)

Putting the value of x and y in the expression, we get

 2(y - 3xy)

= 2{4 - 3(-5)(4)}

= 2 { 4 + 60}

= 2( 64)

= 128

∴ 2(y - 3xy)  = 128

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