Question

(3x+y)-3x(3x-2y) при y=3.5​

Answer 1

Ответ:

Пошаговое объяснение:

(3х+3.5)-3х(3х-7)

3х+3.5-9х-3x+7

10.5-9x

Answer 2

To evaluate the expression (3x + y) - 3x(3x - 2y) when y = 3.5, simply substitute the value of y into the expression and perform the arithmetic:

Step 1: Replace y with 3.5 in the expression: (3x + y) - 3x(3x - 2y) = (3x + 3.5) - 3x(3x - 2(3.5))

Step 2: Simplify the expression using the distributive property: = 3x + 3.5 - 3x(3x - 7)

Step 3: Further simplify the expression by multiplying out the remaining terms: = 3x + 3.5 - 9x^2 + 21x

Step 4: Rearrange the terms in descending order of degree: = -9x^2 + 24x + 3.5

So, the simplified expression is -9x^2 + 24x + 3.5 when y = 3.5.