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How do you solve #100x^2 = 121#?

Answer 1

#x = +11/10 or x = -11/10#

The general rule for solving a quadratic equation #(x^2")# is to make it equal to 0. However this case is the exception because there is no term in #x#.

#100x^2 = 121" make "x^2" the subject"#

#x^2 = 121/100" find the square root"#

#x = +-sqrt(121/100)#

#x = +11/10 or x = -11/10#

We can also follow the usual method to get:

#100x^2 - 121 = 0" factorise"#

#(10x+11)(10x-11)=0#

#x = -11/1 or x = 11/10#

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Answer 2

Kennedy Adams

#x=1.1#
#x=-1.1#

#100x^2=121# OR #x^2=121/100# OR #x=sqrt(121/100)# OR #x= 11/10# #x=1.1# OR #x=-11/10# #x=-1.1#

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Answer 3

Savannah Anderson

To solve the equation 100x^2 = 121, you first divide both sides by 100 to isolate x^2. This gives you x^2 = 121/100. Then, you take the square root of both sides to solve for x. Since there are two possible solutions for the square root, positive and negative, you will have two solutions for x: x = ±√(121/100). Simplifying the square root gives you x = ±11/10. Therefore, the solutions for the equation are x = 11/10 and x = -11/10.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.