x2 + x - 30 = (x + 6)(x - 5)
x2 + 11x + 30 = 0 (x + 5)(x + 6) = 0 so the roots are -5 and -6
y=x2-10x+30=(x-5)2-25+30=(x-5)2+5
No.
x2+6x+5=0(x+1)(x+5)=0x=-1 and x=-51-6+5=0 and 25-30+5=0 so both answers work.
x2 + x - 30 = (x + 6)(x - 5)
x2 + 11x + 30 = 0 (x + 5)(x + 6) = 0 so the roots are -5 and -6
y=x2-10x+30=(x-5)2-25+30=(x-5)2+5
If you have an equation of x2 plus x2, it is the same as saying 2 times x plus 2 times x. This can be written as 2x + 2x or x2 + x2. It is the same, then, as 4x. For example, if x equals 5: 2(5) + 2(5) = 10 + 10 = 20. 20 also equals 4(5).
No.
x2+6x+5=0(x+1)(x+5)=0x=-1 and x=-51-6+5=0 and 25-30+5=0 so both answers work.
x2 + 10x = 0 x2 + 10x + 25 = 25 (x + 5)2 = 25 x + 5 = +-5 x1 = 0 x2 =10
-5, -6
Implicit: x2 + 2y = 5 Explicit : y = (5 - x2)/2
x2+12x+5 = 3 x2+12x+5-3 = 0 x2+12x+2 = 0
No, it is not.
x2 + 2x - 15 = (x - 3)(x + 5)