0.272 - 0.232
.50
.27
0.02
0.2
xu + xv + yu + yv = ?
(x + y)(u + v)
(x + u)(y + v)
(x - u) (y - v)
(x + v) (y + x)
672 - 332 = ?
67
33
34
3400
(a - 10)(a + 4) = ?
a2 - 6a - 40
a2 + 6a + 40
a2 + 6a - 40
a2 - 6a + 40
(x - 2)(x - 9) = ?
x2 - 11x + 18
x2 - 11x - 18
x2 + 11x - 18
x2 + 11x + 18
3pq + 5p + 9q + 15 = ?
(3q + 5)(p + 3)
(3q - 5) (p + 3)
(3q - 5)(p - 3)
(3q + 5) (p - 3)
51 × 49 = ?
2499
2500
5149
2501
12.5 × 12.5 - 2 × 12.5 × 0.5 + 0.5× 0.5 = ?
144
121
12
12.55
ac - ad + bc - bd = ?
(a + b) (c - d)
(a - b)(c - d)
(a + b) (c + d)
(a + c) (b - d)
-5n2 + 25n - 20 = ?
(n + 1)(20 - 5n)
(n - 1)(20 - 5n)
(n - 1)(5n - 20)
(n + 1)(5n + 20)
