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(2x+6)(4x+7)=6x+13)
We move all terms to the left:
(2x+6)(4x+7)-(6x+13))=0
We get rid of parentheses
(2x+6)(4x+7)-6x-13)=0
We multiply parentheses ..
(+8x^2+14x+24x+42)-6x-13)=0
We add all the numbers together, and all the variables
(+8x^2+14x+24x+42)-6x=0
We get rid of parentheses
8x^2+14x+24x-6x+42=0
We add all the numbers together, and all the variables
8x^2+32x+42=0
a = 8; b = 32; c = +42;
Δ = b2-4ac
Δ = 322-4·8·42
Δ = -320
Delta is less than zero, so there is no solution for the equation
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