exam
Maths Puzzle
Numerical Ability
could some one check for me please?
b^2-ab-6a^2
=(b+6a)(b-a)
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exam Other Question
How many gallons of a 20% ammonia solution must be mixed with a 5% ammonia solution to create 20 gallons of 11% ammonia solution?
Need help with the following equation
Simplify each expression:
a. (x + 2)^2 - (x - 2)^2
b. (3x + 4)(2x - 2) - (2x + 1)(x + 3)
c. (a + b)^2 - (a - b)^2
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2ab