Question

(1.5m+0.7n)(1.5m-0.7n)​

Answer 1

Answer:

(1.5m+0.7n) (1.5m-0.7n)

identity-(a+b) (a-b)

=(a²-b²)

a=1.5m and b=0.7n

(1.5m²-0.7n²)

= 2.25m²-490n²

..........................

Answer 2

Answer:

$(1.5m + 0.7n)(1.5m - 0.7) \\( 1.5m) {}^{2} - (0.7 ){}^{2} \\ 2.25 -0. 49 = 1.76$