(a-5)(a-2)-(a-6)(4+a) при a=-2/5

Question

(a-5)(a-2)-(a-6)(4+a) при a=-2/5

Answer 1

(-0,4-5)(-0,4-2)-(-0,4-6)-(4+(-0,4))

Comments

(-5,4)(-2,4)-(-6,4)(3,6)=12,96-(23,04)=36