Question

If 3x-4= 11 then the value of 3x² – 7x​

Answer 1

Step-by-step explanation:

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Answer 2

$3x - 4 = 11$

$3x = 11 + 4$

$3x = 15$

$x = \frac{15}{3}$

$x = 5$

$=3 {x}^{2} - 7x$

$= 3 {(5)}^{2} - 7(5)$

$= 3 \times 25 - 35$

$= 75 - 35$

$= 40$