Expand (x-3)(x+7)
FOIL Method: F - First xx = x2 O - Outside x7=7x I - Inside -3x=-3x L - Last -37= -21 Add all the results up to get the answer: x2+7x-3x-21 = x2+4x-21
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All answers ▸There are 420 balls in a ball pool. There is a combination of violet, blue, yellow and green balls. 2/7 are violet, 35% are blue and the ratio of yellow to green is 4:5. How many of each colour ball is there in the ball pool?
What are the two roots of the equation (4x-8)(x-3) = 0?
Factorise 12x^2 - 20x + 3
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