Solve x^2=49 , where x is a real number.
Answers
Hello there! The answer to your question is -7 and 7.
Remember: A real number is any number that can be displayed on a number line.
Taking this, and using basic properties of multiplication, we want to find what number multiplied by itself would equal 49.
Well, 7 times 7 equals 49, so we have our answer. But, 7 isn't our only value for x. Remember that when you multiply with negatives, two negatives cancel each other out and you are left with a positive, making -7 another solution.
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Answer:
x = ±7
Step-by-step explanation:
We have given a quadratic equation.
x² = 49
We have to find the value of x.
Taking square root to given equation, we have
√x² = √49
(±7)² = 49
putting in above equation, we have
x = ±7 which is the answer.