Question

What is the answer of 5x2 - 3x + 1 - 2x2 + 5x - 6

Answer 1

Answer:

ANS:7X²-8X+10

Step-by-step explanation:

Step-1 : Multiply the coefficient of the first term by the constant   7 • 10 = 70 

Step-2 : Find two factors of  70  whose sum equals the coefficient of the middle term, which is   -8 .

     -70   +   -1   =   -71     -35   +   -2   =   -37     -14   +   -5   =   -19     -10   +   -7   =   -17     -7   +   -10   =   -17     -5   +   -14   =   -19     -2   +   -35   =   -37     -1   +   -70   =   -71     1   +   70   =   71     2   +   35   =   37     5   +   14   =   19     7   +   10   =   17     10   +   7   =   17     14   +   5   =   19     35   +   2   =   37     70   +   1   =   71

Observation : No two such factors can be found