Question

1-(а+4)(9-а)-(а+3)(а-5) при а = 10

Answer 1

1-(10+4)(9-10)-(10+3)(10-5)=1-(14*-4)-(13*5)=1-(-14)-(65)=1+14-65=-50

Answer 2

To evaluate the expression 1 - (a + 4)(9 - a) - (a + 3)(a - 5) when a = 10, we substitute the value of a into the expression and perform the necessary calculations.

Let's calculate step by step:

1 - (a + 4)(9 - a) - (a + 3)(a - 5) 1 - (10 + 4)(9 - 10) - (10 + 3)(10 - 5) 1 - (14)(-1) - (13)(5) 1 + 14 - 65 15 - 65 -50

Therefore, when a = 10, the value of the expression 1 - (a + 4)(9 - a) - (a + 3)(a - 5) is -50.