Question

find the values of expression to 25 x square + 70 x + 49 if x is equal to -1

Answer 1

$f(x)= 25 {x}^{2} + 70x + 49 \\ \\ f( - 1)= 25 {( - 1)}^{2} + 70 \times ( - 1) + 49 \\ \\ = 25 \times 1 - 70 + 49 \\ \\ = 25 + 49 - 70 \\ \\ = 74 - 70 \\ \\ = 4 \\ \\ \boxed{ \red{f( - 1) = 4}}$

Answer 2

Answer:

4

Step-by-step explanation:

x=-1

$25x^{2} + 70x + 49$

$25(-1){2} + 70(-1) + 49$

$25 - 70 + 49$

4