Please help on this question :(

Mathematics

1 answer:

lara [203]3 years ago

6 0

Answer:

a and maybe d

Step-by-step explanation:

supplementary=adds to 180

cant be b becasuse both angles are acute meaning they are less than 90 degrees, so its unable to add to 180.

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Vesnalui [34]

Answer:

Step-by-step explanation:

a = 2, b = 1, c = -3

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a * c = 6 and the factors of 6 and 1 and 6, 2 and 3. Well, 6 - 1 doesn't equal 1 and neither does 6 + 1. So our factors are 3 and 2. In order to combine those to get a 1 (our b), we will subtract 2 from 3 since 3 - 2 = 1. That means that 3 is positive and 2 is negative. Filling in the formula with 3 and 2 in place of 1 looks like this (always remember to put the absolute value of the largest number first):

$2x^2+3x-2x-3=0$

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$(2x^2+3x)-(2x-3)=0$ and factor out what's common in each set of parenthesis.

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Notice that when we factor out a -1 from the second set of parenthesis, we can distribute it back in to get the equation we started with. We know that factoring by grouping "works" if what is inside both sets of parenthesis is exactly the same. Ours are identical: (2x + 3). That is common now, and can be factored out:

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