+ 4xy + 4y2
- xy - 2y2
+ 3xy + 2y2
But it's not properly factoried so I'm unsure about it?
The next one was factorise: 4x2
+ 2x + 1
I'm confused because
1 and 1 = 2 and 2 (*2) = 4 or 0 - not 2
4 and 1 (*4 and *1) = 5 or 3 - also not 2
and neither of these combinations work so I don't know what else to do?
And the last one is solve: (1/49)-1/2
I know that it means square root of 1/1/7 because the power1/2
= square root and the - means 1 over but 1/1/7 isn't a rational number and when I try turning it into a decemal it goes on forever and because it would be 1/0.143 (rounded) its still not a rational number so I am incredibly confused and would really apreciate help..? By the way I'm not aloud to use a calculator so could you please explain without one?