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Solving equations

Affection

(x+1)(2x+3) = 4x²- 22

I can't seem to solve this?

Reply 1

Wahrheit

Original post by Affection

(x+1)(2x+3) = 4x²- 22

I can't seem to solve this?

2x^2 -5x-25=0 through bracket expansion and rearranging

(5+-root(25+200))/2 using quadratic formula

Solutions are 10 or -5

EDIT halve those answers sorry, everything should be over 4 not over 2

(edited 9 years ago)

Reply 2

Affection

Original post by Wahrheit

2x^2 -5x-25=0 through bracket expansion and rearranging

(5+-root(25+200))/2 using quadratic formula

Solutions are 10 or -5

EDIT halve those answers sorry, everything should be over 4 not over 2