4.9 x $t^{2}$ - 20 x t + 50 = 0
35x $a^{4}$-140x $a^{2}$>0
4.9x $t^{2}$ - 20xt + 50 = 0
solve the following simultaneous equations:
6(2x-1+y)+5=-13
y(3x+5)=3x(+y)-26
4.9x2
4.9
fully factorize 2ac+6cd
20 = 3,625r² - πr²
0.85 * 469
n^2+9n+20
