Simplify
6x + (-9) + 5x - 1
11x - 10
Expand:
(2x + 5)(7a - 4b)
14ax - 8bx + 35a - 20b
Factorise completely:
-16m + 8mn - 40n + 56
or
-8 (2m - mn + 5n - 12)
x - 8 = -5
3
- (2b + d -9) + 5
-2b - d +14
Expand:
(9g - 4h)( - g + 5h)
-9g2 + 49gh - 20h2
Factorise completely:
20ab2c + 30a2b3c - 21abc2
abc (20b + 30ab2c - 21c)
x2 = 100
10 or -10
(16a^2bc^3)/(24bc
(2a^2c)/3
Expand:
-(3m + 5p)(m - p)
- (3m2 - 3mp + 5mp - 5p2)
= - (3m2 + 2mp - 5p2)
= - 3m2 - 2mp + 5p2
Factorise completely:
(Clue: Can you see a common factor without expanding the expression?)
2(x+1) - y (x+1)
2(x+1) - y (x+1) = (x+1)(2-y)
6a - 5 = 2a + 11
a = 4
20 - x = -10x - 34
x = -6
3(-2m +5) - 4 = 0
m = 11/6 or 1 5/6