Question

Find the value of 3m²-2m-7 if m=-1​

Answer 1

Answer:

-2

Step-by-step explanation:

3m^2-2m-7 =0

3(-1×-1) -2(-1) -7=0

3+2-7=0

-2

Answer 2

$3 {m}^{2} - 2m - 7 \\ 3 \times ( - 1) {}^{2} - 2 \times - 1 - 7 \\ 3 \times 1 + 2 - 7 \\ 5 - 7 = \boxed {\red{ - 2}}$