3 years ago

Which property is illustrated by 45+19=19+45

1 answer:

6 0

The property that is illustrated is the Commutative Property Of Addition. This is because there are no parenthesis, the numbers switch order, and the answer remains the same.

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How many variable terms are in the expression 3x^3y+5x^2-4y+z+9? Numeric Value Only.

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2 years ago

2x squared + 9x=-5 i need to solve for x

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$2x^2+ 9x=-5 \\ \\2x^2 + 9x+5 =0 \\\\a=2, \ \ b=9 , \ \ c=5 \\\\\Delta =b^2-4ac = 9^2 -4\cdot 2\cdot 5 = 81-40=41 \\ \\x_{1}=\frac{-b-\sqrt{\Delta} }{2a}=\frac{-9-\sqrt{41}}{2\cdot 2 }=\frac{-9-\sqrt{41}}{ 4 }\\\\ x_{2}=\frac{-b+\sqrt{\Delta} }{2a}=\frac{-9+\sqrt{41}}{2\cdot 2 }=\frac{-9+\sqrt{41}}{4 }$