Solve the following equations x^2-2x+4=0, x^2+4x+1=0
x2-2x+4= (x-2)(x-2)=0 x=-2 (double root)
x2+5x+1=0
x1,2= -5+_ (52-4(1)(1) )0.5/2
x1=4.8 x2=-0.2 (to 1 d.p.)
KF
Related Maths GCSE answers
All answers ▸Ayo is 7 years older than Hugo. Mel is twice as old as Ayo. The sum of their three ages is 77 Find the ratio of Hugo's age to Ayo's age to Mel's age.
Solve the simultaneous equations: 3x + 2y = 9 and x + 7y = 22.
A t-shirt is in two shops, both of which has it on sale. In shop A, the t-shirt originally cost £15, but has been reduced by 30%. In shop B, it used to cost £17 and has been reduced by 40%. In which shop is the t-shirt now cheaper, and by how much?
solve the equation x^2 -5x +1 = 25