Z2 - 5Z + 4 = 0 (Z- 1)(Z - 4) so, Z = 1 ---------- and Z = 4 -----------
r = 5z 15z = 3y (divide by 3 to both sides) 5z = y r = y
15z² - 22z - 5 = 0 → (5z + 1)(3z - 5) = 0
-96 = 33-y -96-33 = -y -129 = -y y = 129 Remember a minus divided into a minus is equal to a plus.
x=372/71 y=-21/9
if: r = 5z 15z = 3y then: z = y/5 r = 5(y/5) r = y
Z2 - 5Z + 4 = 0 (Z- 1)(Z - 4) so, Z = 1 ---------- and Z = 4 -----------
r = 5z 15z = 3y (divide by 3 to both sides) 5z = y r = y
15z² - 22z - 5 = 0 → (5z + 1)(3z - 5) = 0
It is then 2y
8x + 5z - 4x + 3z + 6 = 8x - 4x + 5z + 3z - 6 = 4x + 8z - 6
-4x + 6y - 5z = 60At the x-intercept, 'y' and 'z' are zero:-4x = 60 ===> x = -15At the y-intercept, 'x' and 'z' are zero:6y = 60 ===> y = 10At the z-intercept, 'x' and 'y' are zero:-5z = 60 ===> z = -12
-96 = 33-y -96-33 = -y -129 = -y y = 129 Remember a minus divided into a minus is equal to a plus.
x=372/71 y=-21/9
An equation where Y = -7
y² - y all depends on the value of y. If you want to factor the expression, then we have y(y - 1)
9z-5z = 30+z 3z = 30 z = 10