What value of b makes the trinomial below a perfect square? X^2-bx+100

a- 10
b-20
c-5
d-50

b) 20

Step-by-step explanation:

x^2-20x+100 If you factor it, it would be (x-10)^2

the correct answer to your question is a. 4^4

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i suppose it should be (y=2x-5)

step-by-step explanation: