What value of k will make the expression 4x2 + kx + 9 a perfect square trinomial?
A. - 12
B. - 6
C. 6
D. 36
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What value of k will make the expression 4x2 + kx + 9 a perfect square trinomial?
A. - 12
B. - 6
C. 6
D. 36
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Answer:
its 12 or -12
Step-by-step explanation:
just sqaureroot the first number and the last one then multiply by 2 which means that if there is 12 in the choices pick 12 and -12
[tex]\sqrt{4} = 2\\\sqrt{9} = 3\\2*3*2 = 12[/tex]