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(b² - 4ac)^1/2 = 0 ---> 1 root

Three whole numbers are each rounded to the nearest 10. The sum of the rounded numbers is 70.  Work out the maximum possible sum for the original three numbers.Sum of rounded numbers is 70, rounded number...

Law of indices : Rule: a^m * a^n = a^m+nTo multiply expressions with the same base, copy the base and add the indices. Lets start with gathering the a's - a^3 and a^2 adding the indices gets a^5Now b's - ...

For example: 3(2a + 5) + 5(a - 2)
The key is to approach this question in two steps, with the first step being to expand the brackets before then simplifying where possible. A good method for expand...

I would show the student two methods of solving this answer.The first method by:Finding two numbers that multiply to make -3 and simultaneously add to make +2.The two num...