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Mathematics

1 answer:

Sergio [31]3 years ago

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Answer:

Step-by-step explanation:

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Match each expression to its equivalent standard form.

Aleksandr [31]

Let's expand the products they are all in the form

$(a+b)(a-b)=a^2-b^2$

For the first one we have a=x and b=2i:

$(x+2i)(x-2i)=x^2-(2i)^2=x^2+4$

For the second one we have a=x-2 and b=2i:

$(x-2+2i)(x-2-2i)=(x-2)^2-(2i)^2 = x^2-4x+4+4=x^2-4x+8$

For the third one we have a=x+1 and b=i:

$(x+1+i)(x+1-i)=(x+1)^2-i^2=x^2+2x+1+1=x^2+2x+2$

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4 years ago

4.5(8-x) + 36=102-2.5(3x+24) what’s x?

maxonik [38]

Let's solve your equation step-by-step.4.5(8−x)+36=102−2.5(3x+24)Step 1: Simplify both sides of the equation.4.5(8−x)+36=102−2.5(3x+24)Simplify: (Show steps)−4.5x+72=−7.5x+42Step 2: Add 7.5x to both sides.−4.5x+72+7.5x=−7.5x+42+7.5x3x+72=42Step 3: Subtract 72 from both sides.3x+72−72=42−723x=−30Step 4: Divide both sides by 3.3x3=−303x=−10

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3 years ago

Read 2 more answers

Factor each expression 31

katrin2010 [14]

You can’t factor 31 since it’s a prime number luv

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3 years ago

Which description does NOT guarantee that a quadrilateral is a rectangle?

grandymaker [24]

The answer would be : A parallelogram with congruent sides does NOT guarantee that a quadrilateral is a rectangle

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