Question

,factorise the expression 9m²-64m² using an appropriate identify​

Answer 1

Answer:

$9m {}^{2} - 64m {}^{2} \\ \\ = (3m) {}^{2} - 2 \times 3m \times 8m + (8m) {}^{2} \\ \: \: \: \: \: \\ = (3m - 8m) {}^{2} \\ \\ = (3m - 8m) \: (3m - 8m)$

Answer 2

Answer:

9m

9m 2

9m 2 −64m

9m 2 −64m 2

9m 2 −64m 2

9m 2 −64m 2 =(3m)

9m 2 −64m 2 =(3m) 2

9m 2 −64m 2 =(3m) 2 −2×3m×8m+(8m)

9m 2 −64m 2 =(3m) 2 −2×3m×8m+(8m) 2

9m 2 −64m 2 =(3m) 2 −2×3m×8m+(8m) 2

9m 2 −64m 2 =(3m) 2 −2×3m×8m+(8m) 2 =(3m−8m)

9m 2 −64m 2 =(3m) 2 −2×3m×8m+(8m) 2 =(3m−8m) 2

9m 2 −64m 2 =(3m) 2 −2×3m×8m+(8m) 2 =(3m−8m) 2

9m 2 −64m 2 =(3m) 2 −2×3m×8m+(8m) 2 =(3m−8m) 2 =(3m−8m)(3m−8m)

9m 2 −64m 2 =(3m) 2 −2×3m×8m+(8m) 2 =(3m−8m) 2 =(3m−8m)(3m−8m)