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Factorize 2(x^2) - 2x - 12 fully

2(x²) - 2x - 12= 2( x^2 - x - 6)The constant is negative so the 2 factors must have opposite signs. Then, the x term is negative so the larger one must be negative, and the smaller one positive...

Answered by Danielle H. • Maths tutor

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How do you prove a mathematical statement via contradiction?

For a proof via contradiction, you would start by assuming the statement is actually false¹ (even if the given statement seems inherent...

Answered by Jake S. • Maths tutor

3245 Views

Rearrange 4(2x + y) = 11 + 7y to make x the subject

4(2x + y) = 11 + 7y expand the brackets8x + 4y = 11 + 7y move +4y to the other side8x = 11 + 3y move 8 to the other sidex= (11 + 3y)/8

Answered by Ashley Y. • Maths tutor

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3^a = 1/9, 3^b = 9sqrt(3) c = 1/sqrt(3). Work out the value of a + b + c

I will explain best during the interview on the whiteboard space

Answered by Eduardo C. • Maths tutor

10881 Views

A plane travels at 213 miles per hour. Work out an estimate for how long, in seconds, the plane takes to travel one mile.

213 miles/hour speed = distance/time
round 213 to 200 as only an estimate;
s=200/1 hour = 200/3600 seconds (then divide by 200 to get time for 1 mile)s = 1/18
at this speed, the plane trave...

Answered by Owen W. • Maths tutor

13495 Views