Question

(x+(1)÷(3))(x-(7)÷(3))​

Answer 1

Question:

$\frac{x + 1}{3} \times \frac{x - 7}{3}$

Answer:

$\boxed{{x}^{2} - 6x - 7}$

Step-by-step explanation:

$\frac{x + 1}{3} \times \frac{x - 7}{3}$

$\longrightarrow = \frac{(x + 1)(x - 7)}{9}$

$\longrightarrow \boxed{{x}^{2} - 6x - 7}$

Formula used:

$(x + a)(x + b) = {x}^{2} + (a + b)x + ab$

$(x + 1)(x - 7) = {x}^{2} + (1 - 7)x - 7$

$\boxed{ = {x}^{2} - 6x - 7}$