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Question Number 96052 by 174 last updated on 29/May/20

Answered by john santu last updated on 29/May/20

$$(\mathrm{a}-3)(\mathrm{a}+10)={\mathrm{a}}^2+7\mathrm{a}-30$$$$=13-30=-17$$$$(\mathrm{a}+2)(\mathrm{a}+5)={\mathrm{a}}^2+7\mathrm{a}+10=23$$$$\mathrm{then}=(-17)\times \left(23\right)=-391$$

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