Which polynomial is a perfect square trinomial?

9x2 − 12x + 4

36b2 − 24b + 16

16x2 − 24x − 9

4a2 − 10a − 25

Question

Which polynomial is a perfect square trinomial?

 9x2 − 12x + 4

 36b2 − 24b + 16

 16x2 − 24x − 9

 4a2 − 10a − 25

jigglypuff314 · Answer

perfect square trinomial: x^2 - 2xy + y^2

anonymous · Answer

what exactly is a perfect square?

jigglypuff314 · Answer

16 is a perfect square because 4*4 = 16
9 is a perfect square because 3*3 = 9
6 is not a perfect square because there is not integer multiplied by itself that gives you 6

anonymous · Answer

What is a polynomial? @jigglypuff314

jigglypuff314 · Answer

suffix -nomial means function with one or more variables
prefix poly-    means two or more
so polynomial means a function with two or more variables

anonymous · Answer

9x2 − 12x + 4

jigglypuff314 · Answer

yes :)

anonymous · Answer

so is the answer B?

jigglypuff314 · Answer

9x^2-12x+4 is the correct answer

anonymous · Answer

9x2 − 12x + 4 


so it's like 9 times 2 is 18 -12 and that's 6 plus 4 is 10? and 10 is a perfect square?

jigglypuff314 · Answer

10 is not a perfect square
perfect square trinomial: x^2 - 2xy + y^2
                    meaning:   x*x - 2xy + y*y
9x^2 - 12x + 4 is the correct answer because
3x*3x - 2*3x*2 + 2*2  which fits the format

anonymous · Answer

Okay thank you so much!