Find all real values of that satisfy the equation x(squared) - 7x = 98

Find all real numbers such that the square of the number is 48 more than double the number.

Find all real numbers x that satisfy the equation (x-4)(x-8)= 12

Expand the product: (x+8)(x-9)

Find all real values of t that satisfy the equation t(Squared) =324

thank you guys im just reallly really confused on the subject. it would help a lot thanks!

Android4EVER
Dec 6, 2018

#1**+2 **

1 Do you know how to use the quadratic formula? x^2 -7x-98 = 0

2 x^2 -48 = 2x x^2-2x-48=0 (x-8)(x+6) so x = 8 or -6

3 expand x^2-12x+32-12 = 0

x^2-12x+20 = 0 use quadratic formula or just factor it to (x-10)(x-2) = 0 so x = 10 or 2

4 x^2-x-72

5 t^2 = 324 so t = + or - sqrt 324 = +-18

ElectricPavlov
Dec 6, 2018

#3**+1 **

(x+7)(x-14)= 0 so x =-7 and 14

Quadratic Formula for solving quadratic equations in the for ax^2 +bx + c = 0 :

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

ElectricPavlov
Dec 6, 2018