work out the rank of 3x3 matrix (0 -1 6, 7 3 -4, 4 2 -4)
y^2-6y
7^x*2^(1-x)=12
4a-8-5a
7^x(2^(1-x))=12
solve the simulatneous equation:
y=2-x
x^2+y^2= 34
solve for x (2*3=1.5)^x
sum_(k=1)^(2 n) (-1)^k 2^(k - 1) binomial(2 n, k) = 0
3x^2+8x+1=0
