Answer:
Their is this website that has any basically every calculator on it and it show work. It is called "calculator soup"
x = -2, x = 5
=> f(x) = a(x+2)(x-5), a ∈ R
The answer for this is 10
99 and 59
X=big number
X-40 = small
X+ x-40 =158
2X -40=158
2X =198
X=99. Big number is 99
99-40 =59
99+59=158
