*math* explantion needed!

two real, equal roots

Step-by-step explanation:

Start by finding the discriminant, b^2 - 4ac.  The coefficients of this quadratic are a = 49, b = 42 and c = 9.  The discriminant is therefore

(42)^2 - 4(49)(9) = 0.  Rule:  If the discriminant is zero (0), then the quadratic has two real, equal roots.

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11 -1> 1 -1+ a

-12 > a