Question

Check all polynomials that are perfect square trinomials:

49x2 − 8x + 16

4a2 − 20a + 25

25b2 − 5b + 10

16x2 − 8x + 1

Help Im stuck

Answer 1

remember this
\[ \large (v+w)^2=v^2+2vw+w^2 \]

Answer 2

for the first one, for example, u have
\[ \large 49x^2=(7x)^2 \]
and
\[ \large 16=(4)^2 \]
but
\[ \large 2\cdot7x\cdot 4=56x \]
so do u think the first one is a perfect square?

Answer 3

no

Answer 4

good now do the same with all the others and u r done

Answer 5

do u understand what i did? don't u?

Answer 6

Ya thanks I got the second one and the fourth one

Answer 7

GOOD JOB