2x8-16Using the numbers from S to 13 construct a 3x3 magic square.What

1.	2x8-16Using the numbers from S to 13 construct a 3x3 magic square.What is the magic sum here?Find the product(3t + 1) (3t +4)8.9.10. Find the value of x in the given diagram.411011. Factorise a2 3a -40
Answer» 9. (3t+1)(3t+4) = 9t² + 12t + 3t + 4 = 9t²+15t+4 10. 90+ 4x +x = 180° ( staright line)5x = 90°x = 90°/5 = 90° 11.a² -3a -40a² +5a -8a -40a(a+5) -8(a+5)(a-8)(a+5)

2x8-16Using the numbers from S to 13 construct a 3x3 magic square.What is the magic sum here?Find the product(3t + 1) (3t +4)8.9.10. Find the value of x in the given diagram.411011. Factorise a2 3a -40

Answer»

9. (3t+1)(3t+4) = 9t² + 12t + 3t + 4 = 9t²+15t+4

10. 90+ 4x +x = 180° ( staright line)5x = 90°x = 90°/5 = 90°

11.a² -3a -40a² +5a -8a -40a(a+5) -8(a+5)(a-8)(a+5)