Question

190*190 using the identities

Answer 1

Step-by-step explanation:

190× 190

we can write this as .

(100+90) × (100+90)

we know that

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

so

$( {100 + 90)}^{2} \\ = {100}^{2} + 2 \times 100 \times 90 + {90}^{2} \\ = 10000 + 18000 + 8100 \\ = 36100$