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emmainna [20.7K]
3 years ago
11

How do you simplify 2xy+3ab-4xy-9ab. Show how you did it

Mathematics
2 answers:
Black_prince [1.1K]3 years ago
8 0
2xy+3ab-4xy-9ab
2xy-4xy   3ab-9ab
-2xy              -6ab
        
answer = -2xy-6ab


DENIUS [597]3 years ago
7 0
2xy+3ab-4xy-9ab
First you wanna find like terms 
Like 2xy and -4xy they have the same letters
SO do 2xy-4xy and you should a negative number like -2xy make sure after you subtract you and the letters one the number
Now do 3ab and -9ab the same way i did it with the other like terms you subtract and should get -6ab so after you gotten both of thoss solved you should have the expression
    -2xy-6ab
Hope this helped :)
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The question involves a chi-squared test whose p-value is to be determined.

H₀: σ² ≤ 0.027   (null hypothesis)

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