Answer:
1. x^2-100=0
x^2= 100
√x^2= +/- √100
x= +/- 10
x= 10 or x= -10
2. m^2-3m=18
m^2-3m-18=0
a=1, b=-3, c=-18.
m= −b±√b^2−4ac
2a
m= −(−3)±√(−3)2−4(1)(−18)
2(1)
m= 3±√81
2
m= 6 or m= −3
3. t^2+8t-33=0
(t−3)(t+11)=0
t-3=0 or t+11=0
t= 3 t= -11
4. 3x^2-21x=0
a=3, b=-21, c=0.
x= −b±√b2−4ac
x= −(−21)±√(−21)2−4(3)(0)
2(3)
x= 21±√441
6
x= 7 or x= 0
5. 2x^2+11x+15=0
a=2, b=11, c=15.
x= −(11)±√(11)2−4(2)(15)
2(2)
x= −11±√1
4
x= −5 or x= −3
1.x = -10 or x = 10
2.m = 6 or m = -3
3.t = 3 or t = -11
4.x = 7 or x = 0
5.x = -2.5 or x = -3
Solution:
1.x² - 100 = 0
(x + 10) ( x - 10) = 0
x + 10 = 0 or x - 10 = 0
2.m² - 3m = 18
m² - 3m - 18 = 0
m² - 6m + 3m - 18 = 0
m(m - 6) + 3 (m - 6) = 0
( m - 6) ( m + 3) = 0
m - 6 = 0 or m + 3 = 0
Step by step explanation:
Hope it's help:)
TY....
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Answers & Comments
Answer:
1. x^2-100=0
x^2= 100
√x^2= +/- √100
x= +/- 10
x= 10 or x= -10
2. m^2-3m=18
m^2-3m-18=0
a=1, b=-3, c=-18.
m= −b±√b^2−4ac
2a
m= −(−3)±√(−3)2−4(1)(−18)
2(1)
m= 3±√81
2
m= 6 or m= −3
3. t^2+8t-33=0
(t−3)(t+11)=0
t-3=0 or t+11=0
t= 3 t= -11
4. 3x^2-21x=0
a=3, b=-21, c=0.
x= −b±√b2−4ac
2a
x= −(−21)±√(−21)2−4(3)(0)
2(3)
x= 21±√441
6
x= 7 or x= 0
5. 2x^2+11x+15=0
a=2, b=11, c=15.
x= −b±√b2−4ac
2a
x= −(11)±√(11)2−4(2)(15)
2(2)
x= −11±√1
4
x= −5 or x= −3
2
Answer:
1.x = -10 or x = 10
2.m = 6 or m = -3
3.t = 3 or t = -11
4.x = 7 or x = 0
5.x = -2.5 or x = -3
Solution:
1.x² - 100 = 0
(x + 10) ( x - 10) = 0
x + 10 = 0 or x - 10 = 0
x = -10 or x = 10
2.m² - 3m = 18
m² - 3m - 18 = 0
m² - 6m + 3m - 18 = 0
m(m - 6) + 3 (m - 6) = 0
( m - 6) ( m + 3) = 0
m - 6 = 0 or m + 3 = 0
m = 6 or m = -3
Step by step explanation:
Hope it's help:)
TY....