Question

3y(5y-7)-3(2y-7)-20
y= - 3​

Answer 1

Given :-

3y(5y - 7) - 3 ( 2y - 7)-20. [where y = -3]

= 3 ×( -3) ( 5 × -3 - 7) -3 ( 2 × -3 -7)-20

= -9 ( -15 - 7) -3 ( -6 -7 ) -20

=( -9 × - 22)( -3 × - 13 - 20)

= 198 (39 - 20)

= 198 × 19

= 3762

Answer 2

Answer:

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