-5n2 + 25n - 20 = ?
(n + 1)(20 - 5n)
(n - 1)(20 - 5n)
(n - 1)(5n - 20)
(n + 1)(5n + 20)
xu + xv + yu + yv = ?
(x + y)(u + v)
(x + u)(y + v)
(x - u) (y - v)
(x + v) (y + x)
51 × 49 = ?
2499
2500
5149
2501
(a - 10)(a + 4) = ?
a2 - 6a - 40
a2 + 6a + 40
a2 + 6a - 40
a2 - 6a + 40
0.272 - 0.232
.50
.27
0.02
0.2
2x2 + 8x - 24 = ?
(x + 6)(2x - 4)
(x - 6)(2x - 4)
(x - 6)(2x + 4)
(x + 6)(2x + 4)
Evaluate 237 × 237 + 363 × 363 + 2 × 237 × 363 = ?
360000
600
3600
36000
672 - 332 = ?
67
33
34
3400
3pq + 5p + 9q + 15 = ?
(3q + 5)(p + 3)
(3q - 5) (p + 3)
(3q - 5)(p - 3)
(3q + 5) (p - 3)
ac - ad + bc - bd = ?
(a + b) (c - d)
(a - b)(c - d)
(a + b) (c + d)
(a + c) (b - d)
