Question

Use a suitable identity and solve (4b2+9)(4b2+7)​

Answer 1

Step-by-step explanation:

Iodine heptafluoride, also known as iodine(VII) fluoride or iodine fluoride, is an interhalogen compound with the chemical formula IF7. It has an unusual pentagonal bipyramidal structure, as predicted by VSEPR theory.

Answer 2

Step-by-step explanation:

${4b}^{2} ( {4b}^{2} + 7) + 9( {4b}^{2} + 7) =$

$= {16b}^{4} + {28b}^{2} + {36b}^{2} + 63$

$= {16b}^{4} + 64 {b}^{2} + 63 = 0$