putaprincess16
14.12.2020 •
Mathematics
For what value of k is the expression 
+k
+49 a perfect square?
a. 7
b. 14
c. 49
d. 98
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Ответ:
k = 14
Step-by-step explanation:
Given:
x⁴ + kx² + 49
Find:
Value of k
Computation:
x⁴ + kx² + 49
(x²)² + (k)(x²) + 7²
we know that;
a² + 2ab + b²
On compare;
k = 2 x 7
k = 14
Ответ:
I voted b, the grade still hasn't come back yet...
Step-by-step explanation: