Step-by-step explanation:
7x(x - 2y)
= 7x.(x - 2y)
= 7x² - 14xy
= (2 + 1)(+5)
= (3)(5)
= 3 × 5
= 15
1) 7x(x - 2y)
= (7x . x) - (7x . 2y)
2) (2 + 1)(+5)
= 3(+5)
= (3 . +5)
= (3 . 5)
