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Factorise 15a^2 + ab - 6b^2

15a²+ab-6b²

=(?a+?b)(?a-?b)

factors of 15= 3 and 5

factors of 6= 2 and 3

if we try (3a+2b)(5a-3b) that gives us 15a²+10ab-9ab-6b²

Answered by Aayushi B. • Maths tutor

2697 Views

In one second a mass of 210 kg of air enters at A. The speed of this mass of air increases by 570 m s–1 as it passes through the engine. Calculate the force that the air exerts on the engine.

F = M x A (A= (V-U)/T) F = 210 x 570 F = 119,700 N

Answered by Sam G. • Physics tutor

3255 Views

June 2008 C1 Paper Differentiation Question

a) ask student: purpose of differentiation (i), how to perform differentiation (ii) (i) to find the gradient of a curve (ii) multiply the coefficient of x by its indice then minus one from the indici perf...

Answered by Nicola G. • Maths tutor

2849 Views

Calculate the distance travelled by the ball traveling at 3m/s for 60 seconds

Speed = Distance/Time Speed = 3 Time = 60 Distance = Speed x Time Distance = 3 x 60 = 120m

Answered by Sam G. • Physics tutor

2721 Views

How does the use of sound and music in Toni Morrison's novels, 'The Bluest Eye' and 'Jazz', enhance our understanding of her writing?

[I have provided an excerpt of an answer that might be expected of an English A Level student in a longer piece of written coursework. I have written an introductory paragraph, setting out my argument, an...

Answered by F.Tamsin H. • English Literature tutor

6041 Views