im bought 10 used books at the yard sale How much did she pay? Did you use addition or multiplication to solve this problem? Why
1 answer:
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x^2 = 20.
sqrt(x^2) = sqrt(20)
x = +- 2sqrt(5)
Answer:
2 and -2
x^2 = 20.
sqrt(x^2) = sqrt(20)
x = +- 2sqrt(5)
Answer:
2 and -2