4(x2 + 4)
(y - 8)(y - 2)
0
(a + 6)(a + 4)
( a2 ) ( a2+1 )
(a2 + a + a2) = (2a2 + a) = a (2a + 1)
True
a2 - 4a + 4
a2 + -5a2 - a2 - a = a2 - 5a2 - a2 - a = a2 - 6a2 - a = -5a2 - a
X=5
4y2+16y+16=0 Divide by 4 on both sides: y2+4y+4=0 Factorise: (y+2)(y+2)=0 Therefore y= -2
p2+10d+7