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Write the number 0.000000001 in standard form.

1 x 10^-9
AH
Answered by Abigail H. • Maths tutor
18106 Views

Expand the brackets and simplify: 7(2x+3y)-x(14-y)

= 14x+21y-14x+xy =y(21+x)
IA
Answered by Ilan A. • Maths tutor
6005 Views

simplify and rationalise 1/ sqrt(12)

Start by simplifying the denominator - We can write sqrt(12) as sqrt (4*3). - This can be written as sqrt(4) * sqrt(3) - We know the square root of 4 is 2. sqrt(3) is not a integer so we leave that as sqrt(3...
MF
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Solve the equation (3x + 2)/(x - 1) + 3 = 4 (3 marks)

First, multiply all terms by (x - 1) to remove the quotient, and multiply out of the brackets: 3x + 2 + 3(x - 1) = 4(x - 1) >>> 3x + 2 + 3x - 3 = 4x - 4. Next, group all like terms on either side an...
DP
Answered by Daniel P. • Maths tutor
4500 Views

Solve x^2+5x+6=0 by factorising

First of all, when we expand brackets we know that the x will be at the start of the brackets (x )(x )= 0 Look a the equation again, x 2 +5x+6=0. All of our numbers are positive so we know that we don't need...
ET
Answered by Emily T. • Maths tutor
75633 Views