MATHEMATICS PROBLEM SOLVER

It is a site for parents, students and teachers. This site can help O-LEVEL or GCSE secondary school students in mastering mathematics subject. It intends to involve the learners by making them follow up the examples before they can do questions on their own at the TRY THIS.... section. There are some videos, tests, quizzes and past examination questions. Learning the examples will ultimately give students the required confidence in solving various questions in mathematics.

Monday 23 March 2015

PERFECT SQUARES 2

If zx² - 28x + 49 = 0 is a perfect square, find the value of z .

Solution

In zx² - 28x + 49 = 0; a=z, b=-28 and c=49.

For the perfect square, b² = 4ac

(-28)² = 4 x z x 49

784 = 196z

196 196

4 = z

Hence the value of z is 4

TRY THIS...................

If zx² - 24x + 16 = 0 is a perfect square, find the value of z .

MATHEMATICS PROBLEM SOLVER

Monday 23 March 2015

PERFECT SQUARES 2

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