y^(2) + 9y - 52 # Write down all the factors of '52' Hence 1, 52 ; 2 , 26 ; 4 , 13 ; By addition or subtraction, select a pair of factors that 'add' to '9' They are, '4' & '13' ; Hence 13 - 4 = 9 Set up ther brackets , without the signs Hence ( y 4)(y 13) Since '52' is negative (-) , then the two signs are different. Since '9' is positive then the larger factor is positive(+). Hence inserting (y - 4)(y + 13) Factored!!!! Done!!!!
18
3x - 9y = 27-9y = -3x + 279y = 3x - 27y = x/3 - 3The graph is a straight line, with (slope = 3), and passing through the point (y = - 3) on the y-axis.
9x2 - 6xy + y2 - 81 = (3x - y)2 - 81 = (3x - y - 9)*(3x - y + 9)
x=9 y=1
64 x cubed minus y cubed is (4x - y)(16x^2 + 4xy + y^2)
(y - 2)(y - 7)
(2y - 5)(y - 2)
8(y - 1)(y^2 + y + 1)
(9y+2z)(y-3z)
8(y - 1)(y^2 + y + 1)
9y cubed plus 2y squared
x2 - y2 + 9x - 9y =(x2 + 9x) - (y2 + 9y) =x(x + 9) - y(y + 9)================================Another way to go after it:x2 - y2 + 9x - 9y =(x2 - y2) + 9x - 9y =(x + y) (x - y) + 9 (x - y) =(x + y + 9) (x - y)
-8-5y = 12-9y 9y-5y - 12+8 4y = 20 y = 5
y^3 + y^2 - 6 (y+2) (y-3) i think
x=372/71 y=-21/9
(2y+1)(y−5)