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20x^{2}+42x+16
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20x^{2}+42x+16
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8x^{2}+12x+4x+6-\left(-4x-2\right)\left(3x+5\right)
Apply the distributive property by multiplying each term of -4x-2 by each term of -2x-3.
8x^{2}+16x+6-\left(-4x-2\right)\left(3x+5\right)
Combine 12x and 4x to get 16x.
8x^{2}+16x+6-\left(-12x^{2}-20x-6x-10\right)
Apply the distributive property by multiplying each term of -4x-2 by each term of 3x+5.
8x^{2}+16x+6-\left(-12x^{2}-26x-10\right)
Combine -20x and -6x to get -26x.
8x^{2}+16x+6-\left(-12x^{2}\right)-\left(-26x\right)-\left(-10\right)
To find the opposite of -12x^{2}-26x-10, find the opposite of each term.
8x^{2}+16x+6+12x^{2}-\left(-26x\right)-\left(-10\right)
The opposite of -12x^{2} is 12x^{2}.
8x^{2}+16x+6+12x^{2}+26x-\left(-10\right)
The opposite of -26x is 26x.
8x^{2}+16x+6+12x^{2}+26x+10
The opposite of -10 is 10.
20x^{2}+16x+6+26x+10
Combine 8x^{2} and 12x^{2} to get 20x^{2}.
20x^{2}+42x+6+10
Combine 16x and 26x to get 42x.
20x^{2}+42x+16
Add 6 and 10 to get 16.
8x^{2}+12x+4x+6-\left(-4x-2\right)\left(3x+5\right)
Apply the distributive property by multiplying each term of -4x-2 by each term of -2x-3.
8x^{2}+16x+6-\left(-4x-2\right)\left(3x+5\right)
Combine 12x and 4x to get 16x.
8x^{2}+16x+6-\left(-12x^{2}-20x-6x-10\right)
Apply the distributive property by multiplying each term of -4x-2 by each term of 3x+5.
8x^{2}+16x+6-\left(-12x^{2}-26x-10\right)
Combine -20x and -6x to get -26x.
8x^{2}+16x+6-\left(-12x^{2}\right)-\left(-26x\right)-\left(-10\right)
To find the opposite of -12x^{2}-26x-10, find the opposite of each term.
8x^{2}+16x+6+12x^{2}-\left(-26x\right)-\left(-10\right)
The opposite of -12x^{2} is 12x^{2}.
8x^{2}+16x+6+12x^{2}+26x-\left(-10\right)
The opposite of -26x is 26x.
8x^{2}+16x+6+12x^{2}+26x+10
The opposite of -10 is 10.
20x^{2}+16x+6+26x+10
Combine 8x^{2} and 12x^{2} to get 20x^{2}.
20x^{2}+42x+6+10
Combine 16x and 26x to get 42x.
20x^{2}+42x+16
Add 6 and 10 to get 16.
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