HELP HELP HELPPP PLEASEE which expression has a leading coefficient that is a perfect square?

49w2+w+53

10w2−19w+100

2w2+25w−9

50w2−5w+25

Which expression is equivalent to the expression below? (6c^2 + 3c) / (-4c + 2) / (2c + 1) / (4c - 1)a. 3c(2c-1) / (2c + 1)b. -3c(2c-1)^2 / (2c + 1)^2c. 3cd. -3c(just took the test its d. -3c)

Which of the following transformations will always produce a congruent figure?

Bring the fraction a/a-4 to a denominator of 16-a^2