Evaluate the algebraic expression when a=-5, b=2, and c=-7 : a^2+b-c
a) -1
b) 5
c) 20
d) 34
I completely forgot how to do this! I was plugging the numbers into that equation. Please explain step by step how to do this! thank you!
10 pts!
1 math question???!! 10 pts! help!?
2016-06-16 6:46 pm
回答 (3)
2016-06-16 7:01 pm
Substitute in the numbers.
(-5)^2 + 2 - -7
(-5)^2 = -5 x - 5 = (+) 25
- - 7 = + 7
Hence
25 + 2 + 7 = 34
(-5)^2 + 2 - -7
(-5)^2 = -5 x - 5 = (+) 25
- - 7 = + 7
Hence
25 + 2 + 7 = 34
2016-06-16 6:50 pm
When a = -5, b = 2 and c = -7 :
a² + b - c
= (-5)² + 2 - (-7)
= 25 + 2 + 7
= 34
...... The answer is : d) 34
a² + b - c
= (-5)² + 2 - (-7)
= 25 + 2 + 7
= 34
...... The answer is : d) 34
2016-06-16 6:49 pm
Well,
a^2 + b - c = (-5)^2 + 2 - (-7)
= 25 + 2 + 7
= 34
d) 34 <--- answer
hope it' ll help !!
a^2 + b - c = (-5)^2 + 2 - (-7)
= 25 + 2 + 7
= 34
d) 34 <--- answer
hope it' ll help !!
收錄日期: 2021-04-18 15:06:15
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