Find-the-numbers-a-and-b-such-that-x-2-4x-5-a-a-b-2-

Question Number 137678 by otchereabdullai@gmail.com last updated on 05/Apr/21

Find the numbers a and b such that

x^{2} - 4 x - 5 = a + {(a + b)}^{2}

Commented by mr W last updated on 05/Apr/21

L H S i s a f u n c t i o n! y o u c a n n o t

d e s c r i b e a f u n c t i o n w i t h a c o n s t a n t

a s y o u r R H S . m a y b e y o u m e a n t :

x^{2} - 4 x - 5 = c + {(a x + b)}^{2} ?

t h e n

x^{2} - 4 x - 5 = x^{2} - 4 x + 4 - 9 = {(x - 2)}^{2} - 9

\Rightarrow a = 1, b = - 2, c = - 9

Commented by otchereabdullai@gmail.com last updated on 10/Apr/21

exactly prof thanks alot