" 5) If "[m,2],[-5,7]|=31" Find "m=square

If the value of determinant |{:(m,2),(-5,7):}| is 31 , find the value of m .

If A= [[3,1],[-1,2]] ,find A^2-5A+7I

Find: (5m + 7n)²

If x^(2) - (5m - 2)x + 4m^(2) + 10m + 25 is a perfect square then m =

One of the roots of equation 5m^(2)+2m+k=0 is -7/5 . Find the value of 'k'.

The perimeter of a sector a circle of radius 5.7 m is 27.2 m. Find the area of the sector.

The perimeter of a certain sector of a circle of radius 5.7 m is 27.2 m. Find the area of the sector.

Sum of the areas of two squares is 468 m^(2) If the difference of their perimeters is 24m, find the sides of the two squares.

Sum of the areas of two squares is 640 m^2 . If the difference of their perimeters is 64m, find the sides of the two squares.

The sum of the areas of two squares is 157 m^(2) . If the sum of their perimeters is 68 m , find the sides of the two squares .