Asked by Tashun Mclean on Sep 23, 2024
Verified
Evaluate 12−8x212 - 8 x ^ { 2 }12−8x2 at x=-2 .
A) 32
B) -20
C) 28
D) 45
E) 50
Algebraic Expression
A mathematical phrase that can contain numbers, variables, and operation symbols but no equals sign.
Evaluate
The process of calculating the value of an expression or determining the outcome of a mathematical operation.
- Conduct evaluations of algebraic expressions by substituting variables with specified values.
- Execute manipulations on algebraic expressions that include exponents and radical terms.
Verified Answer
HJ
Halima Jamalabout 2 hours ago
Final Answer :
B
Explanation :
Substitute -2 for x in the expression:
12−8x2=12−8(−2)2=12−8(4)=12−32=−2012 - 8 x ^ { 2 } = 12 - 8(-2)^2 = 12-8(4) = 12-32= \boxed{-20}12−8x2=12−8(−2)2=12−8(4)=12−32=−20
12−8x2=12−8(−2)2=12−8(4)=12−32=−2012 - 8 x ^ { 2 } = 12 - 8(-2)^2 = 12-8(4) = 12-32= \boxed{-20}12−8x2=12−8(−2)2=12−8(4)=12−32=−20
Learning Objectives
- Conduct evaluations of algebraic expressions by substituting variables with specified values.
- Execute manipulations on algebraic expressions that include exponents and radical terms.