Question

9m^2-30m+25n^2 при m =5.3 n =1.4

Answer 1

Решение смотри на фотографии

Answer 2

To evaluate the expression 9m^2 - 30m + 25n^2 for the given values m = 5.3 and n = 1.4, we can substitute these values into the expression and perform the calculations.

Replacing m with 5.3 and n with 1.4, we have:

9(5.3)^2 - 30(5.3) + 25(1.4)^2

Simplifying each term:

= 9(28.09) - 30(5.3) + 25(1.96) = 252.81 - 159 + 49 = 143.81

Therefore, when m = 5.3 and n = 1.4, the expression 9m^2 - 30m + 25n^2 evaluates to 143.81.