Question

Find two values of b that will make 64x^2+bx+49 a perfect square trinomial?

Answer 1

hint: when you have \(ax^2 + bx +c\)

then \[c = (\frac b2)^2\]
\[\implies \sqrt c = \frac b2\]
\[\implies 2\sqrt c = b\]

so in this case, your c is 49

can you find b now?

Answer 2

ok so what would my 2 values be?

Answer 3

would it not be 7, 8 ?

Answer 4

what is the square root of 49?

Answer 5

7