Answer all pleaseSolution7 2m 45m2 25m m 8m 15 m2 m 6

Solution

7) [ (2m -4)/5m² +25m)]* [ (m +8m + 15) /(m²+ m - 6)] = [ 2(m -2)/5m(m +5)]*[ (m +3)(m + 5)/ (m+3)(m -2)] . or 2, then the given expression = [2(m -2)(m +3)(m + 5) ]/ [5m(m +5)(m+3)(m -2)] =  2/5m. if  m -5, -3, or 2.

8) [(14x³ -4x² )/ (x² -9x + 14)]*[ (4x -28)/(28x -8)] = [ 2x²( 7x -2)/ ( x -2)(x -7)] *[ 4(x -7)/4(7x -2)] = [2x²( 7x -2)* 4(x -7)]/ [ ( x -2)(x -7)*4(7x -2)] = 2[x²( 7x -2)(x -7)]/ [( x -2)(x -7)(7x -2)] = 2x²/(x -2) if x 7 or, 2/7.

9) [ (v+9)/ (v - 6)] ÷ [(v² + 12v +27)/(6v + 18) = [ (v+9)/ (v - 6)] * [(6v + 18)/ (v + 9)(v + 3) ] =    6 (v+9)(v + 3)] / [(v - 6)(v + 9)(v + 3)] = 6 / (v-6) if v -3 or -9.

10) [ (6n³ +60n²) / (n + 10)] ÷ [ (6n² ) /(n + 8)] = [ 6n²( n+ 10) / (n + 10)]* [(n + 8)/ 6n² ]  = [ 6n²( n+ 10)(n +8)]/ [ 6n² (n + 10)] = n + 8 ( if n   0, or -10