Algebra: Solve 10 equations
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Page 313
Solve each equation.
# 8 ( a + 6 )( a + 5 ) = 0
# 9 ( 2x + 5 )9 3x - 4 ) = 0
# 12. t^2 + 6t - 27 = 0
# 48 - 2x^2 - 2x + 24 = 0
# 49 11
Z^2 + ---z = -6
2
# 52 3x (2x + 1 ) = 18
Page 364
Solve each equation. Watch for extraneous solution.
# 29 5 2 x - 1
-------- + ----- = --------
X + 2 x - 3 x - 3
# 30 6 7 y = 1
-------- + ----- = ---------
Y - 2 y - 8 y - 8
Solve each equation.
# 37 w 3w
-- = ---
6 11
# 39 5 x
--- = ---
X 5
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Page 313
Solve each equation.
# 8 ( a + 6 )( a + 5 ) = 0
Then a + 6 = 0 or a + 5 = 0
i.e. a + 6 - 6 = 0 -6 (subtracting 6 from both sides)
a = -6
or a + 5 - 5 = 0 - 5 (subtracting 5 from both sides)
a = -5
Therefore a = -6 or -5
# 9 ( 2x + 5 ) ( 3x - 4 ) = 0
Then 2x + 5 = 0 or 3x - 4 = 0
i.e. 2x + 5 - 5 = 0 - 5 (subtracting 5 from both sides)
2x = -5 or x = ...
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