How would I write (1+4(root)7)/(5+2(root)7) in the form m + n(root)7, where m and n are integers?

We know that any value divided by itself is equal to 1, therefore we can multiply the value in the question by (5-2(root)7)/(5-2(root)7) and the value would not change. We are only changing the values format. We do this because we want to get the denominator to an integer value so we can divide the numerator easily, we know that (root)7 multiplied by (root)7 will give us 7.Thus eventually we will get the answer 17-6(root)7 where m=17 and n=6.
Can demonstrate this on whiteboard if needs be.

AD

Related Maths A Level answers

All answers ▸

Use Integration by parts to find ∫ xsin3x dx


use the substitution u=2+ln(x) to show that int(e,1(ln(x)/x(2+ln(x)^2))dx)=p+ln(q) , where p and q are rational numbers.


Calculate the volume of revolution generated by the function, f(x) = (3^x)√x, for the domain x = [0, 1]


Use integration by parts to find the integral of x sin(3x)