14xsquare + 9x - 1 factorise the question
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14x²+9x-1
= (√14 x)²+2(√14 x)(9/2√14)+(9/2√14)²-(9/2√14)²-1
= (√14 x - 9/2√14)² - 81/56 - 1
= (√14 x - 9/2√14)² - 81-56/56
= (√14 x - 9/2√14)² - 25/56
= (√14 x - 9/2√14)² - (5/√56)²
= (√14 x - 9/2√14+5/√56) (√14 x - 9/2√14-5/√56)
= (√14 x)²+2(√14 x)(9/2√14)+(9/2√14)²-(9/2√14)²-1
= (√14 x - 9/2√14)² - 81/56 - 1
= (√14 x - 9/2√14)² - 81-56/56
= (√14 x - 9/2√14)² - 25/56
= (√14 x - 9/2√14)² - (5/√56)²
= (√14 x - 9/2√14+5/√56) (√14 x - 9/2√14-5/√56)
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hope it will be help you
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