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Question Number 137746 by AzizMuzeifa last updated on 06/Apr/21

Answered by bemath last updated on 06/Apr/21

1.x^2 +1.x = 1.4^3 +0+2.4+0  x^2 +x−72=0  (x+9)(x−8)=0  x=8 solution  x=−9 no solution

$$\mathrm{1}.{x}^{\mathrm{2}} +\mathrm{1}.{x}\:=\:\mathrm{1}.\mathrm{4}^{\mathrm{3}} +\mathrm{0}+\mathrm{2}.\mathrm{4}+\mathrm{0} \\ $$$${x}^{\mathrm{2}} +{x}−\mathrm{72}=\mathrm{0} \\ $$$$\left({x}+\mathrm{9}\right)\left({x}−\mathrm{8}\right)=\mathrm{0} \\ $$$${x}=\mathrm{8}\:{solution} \\ $$$${x}=−\mathrm{9}\:{no}\:{solution} \\ $$

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