7. Evaluate each of the following algebraic expressions for
x = 2, y = -3, z = -2, a = 2, b = 3 x^3+ y^3 + 3xyz + ab
Answers
Answered by
1
Answer:
hope it's helpful to you
Step-by-step explanation:
Correct option is
A
21
Given x=−2,y=−1,z=3
x
2
+y
2
+z
2
−xy−yz−zx
=(−2)
2
+(−1)
2
+(3)
2
−(−2)(−1)−(−1)(3)−(3)(−2)
=4+1+9−2+3+6
=14−2+9
=12+9
=21
Answered by
2
Answer:
x^3 = 2^ 3 = 8
y^3 = -3^3 = -27
3xyz = 3*2*-3*-2 = 36
ab = 2*3 = 6
8-27+36+6
= -19+36+6
= 17+6
= 23
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