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Ashleylora35go
Answered

evaluate the following algebraic expression if x=3,y=4,a= -5 and b =7.

1. x-y-a-b
2. abxy
3. axy-aby
4.(ab)⁴
5.4x-5y​

Sagot :

Leighannvallesgo

Answer:

  1. -3
  2. -420
  3. 80
  4. -8

Step-by-step explanation:

1. x-y-a-b

=(3)−(4)−(−5)−(7)  

= -3

2. abxy

=(−5)(7)(3)(4)

= (-35)(12)  

= -420

3. axy-aby

=[(−5)(3)(4)]−[(−5)(7)(4)]

=−60+140  

=80

4. (ab)⁴

=[(-5)(7)]⁴

=(-35)⁴

=1500625

5.4x-5y​

=4(3)−5(4)

= -8

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