I'm very disappointed and a little depressed that you can't do any of these
twenty problems on your own, and you decided to just dump them on Brainly.
I'm also disappointed that yuu thought the whole thing is only worth 11 points.
I'll do a substantial amount of each problem, but not all of it.
Some of the contribution should be yours.
This whole page is just a bunch of exercises for one fact:
(any difference of two squares) is equal to
(the sum of the square roots of the terms)
times
(the difference of the square roots of the terms) .
That's the solution to everything on the page, right there.
OK. Here we go:
15). (2c + √5 d) (2c - √5 d)
16). (7m² + 4) (7m² - 4)
17). (k³ + 4) (k³ - 4)
18). (2p² + 5) (2p² - 6)
19). (11r³ + 1) (11r³ - 1)
20). (8m² + 3n) (8m² - 3n)
You can do the FOIL checking. I buried one error in there
just so that you'd have something to look for and fix.
21). 6 (2a + 3b) (2a - 3b)
22). 9x (2x + 1) (2x - 1)
23). 5q (3q + 2) (3q - 2)
24). 2 (4s + 3u) (4s - 3u)
25). 4b (5b + 3) (5b - 3)
26). 3x² (x² + 4) (x² - 4)
27). 8y (x + 2y) (x - 2y)
28). 5m (5m + 1) (5m - 1)
29). 3 (n + 7) (n - 7)
30). 2 (3x + 5) (3x - 5)
31). m n (m + 1) (m - 1)
32). 4x (2x + 5) (2x - 5)
33). 5n² (4n + 5) (4n - 5)
34). 3 (2n + 1) (2n - 1)
For this second group, I confess that I did them all in my head,
so you should really do some checking just to make sure.
