sum of 4 term their product is 105
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let the four terms be
(a+d)(a)(a-d)(a-2d)
(a+d)×(a)×(a-d)×(a-2d)=105
(a+d)×(a-d)=105/(a)(a-2d)
a²-d²=105/a²-2ad
a²-2ad( a²-d²)=105
(a+d)(a)(a-d)(a-2d)
(a+d)×(a)×(a-d)×(a-2d)=105
(a+d)×(a-d)=105/(a)(a-2d)
a²-d²=105/a²-2ad
a²-2ad( a²-d²)=105
arshankapali:
now u r 10 the standard and brain is mashallaha
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