Question

2) 81x2 - 25
(a) (9x - 5) (9x - 5)
(c) (9x - 5)2
(b) (9x - 5) (9x + 5)
(d) (9x + 5)2​

Answer 1

Step-by-step explanation:

(b) (9x - 5) (9x + 5)

correct one

Answer 2

5)

(12) 81x2-25 =

A. (9x - 5) (9x-5)

B. (9x - 5) (9x + 5)

C. (9x - 5)2

D. (9x + 5)2

(13) (100x2 - 49) = (10x + 7) =

A. 10x - 7

B. 10x + 7 C. 10x + 49 D. 10x - 49

(14) (4a2 - 20a + 25) = (2a -5) =

A. 2a + 5 B. 2a-5 C. 2a + 25 D. 2a - 25

(15) (x2 + 9x + 18) = (x + 6) =

A.x+3 Box + 6 C.x+2 D. x + 9

(16) Adding

to a? + it becomes a perfect square

trinomial.